693639413 has 4 divisors (see below), whose sum is σ = 693755340. Its totient is φ = 693523488.

The previous prime is 693639391. The next prime is 693639431. The reversal of 693639413 is 314936396.

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

It can be written as a sum of positive squares in 2 ways, for example, as 643484689 + 50154724 = 25367^2 + 7082^2 .

It is a cyclic number.

It is not a de Polignac number, because 693639413 - 2⁸ = 693639157 is a prime.

It is a super-2 number, since 2×693639413² = 962271270533969138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (693639433) 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, 48470 + ... + 61127.

It is an arithmetic number, because the mean of its divisors is an integer number (173438835).

Almost surely, 2^693639413 is an apocalyptic number.

It is an amenable number.

693639413 is a deficient number, since it is larger than the sum of its proper divisors (115927).

693639413 is a wasteful number, since it uses less digits than its factorization.

693639413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115926.

The product of its digits is 314928, while the sum is 44.

The square root of 693639413 is about 26337.0350077605. The cubic root of 693639413 is about 885.2064859146.

The spelling of 693639413 in words is "six hundred ninety-three million, six hundred thirty-nine thousand, four hundred thirteen".