1237952192689 has 9 divisors (see below), whose sum is σ = 1315076574657. Its totient is φ = 1165113673344.

The previous prime is 1237952192663. The next prime is 1237952192693. The reversal of 1237952192689 is 9862912597321.

It is a happy number.

The square root of 1237952192689 is 1112633.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 229148903025 + 1008803289664 = 478695^2 + 1004392^2 .

It is not a de Polignac number, because 1237952192689 - 2⁵ = 1237952192657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1237952192689.

It is not an unprimeable number, because it can be changed into a prime (1237952192629) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 18882037 + ... + 18947485.

Almost surely, 2^{1237952192689} is an apocalyptic number.

1237952192689 is the 1112633-rd square number.

1237952192689 is the 556317-th centered octagonal number.

It is an amenable number.

1237952192689 is a deficient number, since it is larger than the sum of its proper divisors (77124381968).

1237952192689 is an frugal number, since it uses more digits than its factorization.

1237952192689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130932 (or 65466 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 64.

Multiplying 1237952192689 by its sum of digits (64), we get a square (79228940332096 = 8901064²).

It can be divided in two parts, 123795 and 2192689, that added together give a square (2316484 = 1522²).

The spelling of 1237952192689 in words is "one trillion, two hundred thirty-seven billion, nine hundred fifty-two million, one hundred ninety-two thousand, six hundred eighty-nine".