690672358489 has 3 divisors (see below), whose sum is σ = 690673189557. Its totient is φ = 690671527422.

The previous prime is 690672358477. The next prime is 690672358507. The reversal of 690672358489 is 984853276096.

The square root of 690672358489 is 831067.

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

690672358489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a de Polignac number, because none of the positive numbers 2^k-690672358489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690672358589) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 415534 + ... + 1246600.

It is an arithmetic number, because the mean of its divisors is an integer number (230224396519).

Almost surely, 2^690672358489 is an apocalyptic number.

690672358489 is the 831067-th square number.

690672358489 is the 415534-th centered octagonal number.

It is an amenable number.

690672358489 is a deficient number, since it is larger than the sum of its proper divisors (831068).

690672358489 is an frugal number, since it uses more digits than its factorization.

690672358489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662134 (or 831067 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 67.

The spelling of 690672358489 in words is "six hundred ninety billion, six hundred seventy-two million, three hundred fifty-eight thousand, four hundred eighty-nine".