693639 has 12 divisors (see below), whose sum is σ = 1029496. Its totient is φ = 449712.

The previous prime is 693629. The next prime is 693659. The reversal of 693639 is 936396.

693639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 693639 - 2⁵ = 693607 is a prime.

It is a super-2 number, since 2×693639² = 962270124642, which contains 22 as substring.

It is a Duffinian number.

693639 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 693639.

It is not an unprimeable number, because it can be changed into a prime (693619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 709 + ... + 1374.

2⁶⁹³⁶³⁹ is an apocalyptic number.

693639 is a deficient number, since it is larger than the sum of its proper divisors (335857).

693639 is a wasteful number, since it uses less digits than its factorization.

693639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126 (or 2123 counting only the distinct ones).

The product of its digits is 26244, while the sum is 36.

The square root of 693639 is about 832.8499264573. The cubic root of 693639 is about 88.5206310228.

The spelling of 693639 in words is "six hundred ninety-three thousand, six hundred thirty-nine".