1937989741689 has 27 divisors (see below), whose sum is σ = 2892725283279. Its totient is φ = 1250232435360.

The previous prime is 1937989741621. The next prime is 1937989741697. The reversal of 1937989741689 is 9861479897391.

The square root of 1937989741689 is 1392117.

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

1937989741689 is a `hidden beast` number, since 1 + 9 + 37 + 9 + 8 + 97 + 416 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2329703289 + 1935660038400 = 48267^2 + 1391280^2 .

It is not a de Polignac number, because 1937989741689 - 2¹⁹ = 1937989217401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1937989741619) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 129459397 + ... + 129474365.

Almost surely, 2^{1937989741689} is an apocalyptic number.

1937989741689 is the 1392117-th square number.

1937989741689 is the 696059-th centered octagonal number.

It is an amenable number.

1937989741689 is a deficient number, since it is larger than the sum of its proper divisors (954735541590).

1937989741689 is an frugal number, since it uses more digits than its factorization.

1937989741689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30006 (or 15003 counting only the distinct ones).

The product of its digits is 1481421312, while the sum is 81.

Multiplying 1937989741689 by its sum of digits (81), we get a square (156977169076809 = 12529053²).

The spelling of 1937989741689 in words is "one trillion, nine hundred thirty-seven billion, nine hundred eighty-nine million, seven hundred forty-one thousand, six hundred eighty-nine".