693689639 has 4 divisors (see below), whose sum is σ = 730199640. Its totient is φ = 657179640.

The previous prime is 693689629. The next prime is 693689651. The reversal of 693689639 is 936986396.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 693689639 - 2²⁸ = 425254183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (693689629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18254972 + ... + 18255009.

It is an arithmetic number, because the mean of its divisors is an integer number (182549910).

Almost surely, 2^693689639 is an apocalyptic number.

693689639 is a deficient number, since it is larger than the sum of its proper divisors (36510001).

693689639 is a wasteful number, since it uses less digits than its factorization.

693689639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36510000.

The product of its digits is 11337408, while the sum is 59.

The square root of 693689639 is about 26337.9885146911. The cubic root of 693689639 is about 885.2278511500.

The spelling of 693689639 in words is "six hundred ninety-three million, six hundred eighty-nine thousand, six hundred thirty-nine".