693931 has 4 divisors (see below), whose sum is σ = 793072. Its totient is φ = 594792.

The previous prime is 693881. The next prime is 693943. The reversal of 693931 is 139396.

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 693931 - 2¹³ = 685739 is a prime.

It is a super-2 number, since 2×693931² = 963080465522, which contains 22 as substring.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 693893 and 693902.

It is not an unprimeable number, because it can be changed into a prime (693961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49560 + ... + 49573.

It is an arithmetic number, because the mean of its divisors is an integer number (198268).

2⁶⁹³⁹³¹ is an apocalyptic number.

693931 is a deficient number, since it is larger than the sum of its proper divisors (99141).

693931 is an equidigital number, since it uses as much as digits as its factorization.

693931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99140.

The product of its digits is 4374, while the sum is 31.

The square root of 693931 is about 833.0252097026. The cubic root of 693931 is about 88.5330507387.

The spelling of 693931 in words is "six hundred ninety-three thousand, nine hundred thirty-one".