693981331 has 8 divisors (see below), whose sum is σ = 699337184. Its totient is φ = 688642560.

The previous prime is 693981329. The next prime is 693981347. The reversal of 693981331 is 133189396.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 693981331 - 2¹ = 693981329 is a prime.

It is a super-2 number, since 2×693981331² = 963220175553063122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (693981391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84211 + ... + 92083.

It is an arithmetic number, because the mean of its divisors is an integer number (87417148).

Almost surely, 2^693981331 is an apocalyptic number.

693981331 is a deficient number, since it is larger than the sum of its proper divisors (5355853).

693981331 is a wasteful number, since it uses less digits than its factorization.

693981331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8541.

The product of its digits is 104976, while the sum is 43.

The square root of 693981331 is about 26343.5254094815. The cubic root of 693981331 is about 885.3519112886.

The spelling of 693981331 in words is "six hundred ninety-three million, nine hundred eighty-one thousand, three hundred thirty-one".