693981669 has 8 divisors (see below), whose sum is σ = 974009440. Its totient is φ = 438304176.

The previous prime is 693981661. The next prime is 693981679. The reversal of 693981669 is 966189396.

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

It is not a de Polignac number, because 693981669 - 2³ = 693981661 is a prime.

It is a super-2 number, since 2×693981669² = 963221113816051122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 12175117 = 693981669 / (6 + 9 + 3 + 9 + 8 + 1 + 6 + 6 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (693981661) 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, 6087502 + ... + 6087615.

It is an arithmetic number, because the mean of its divisors is an integer number (121751180).

Almost surely, 2^693981669 is an apocalyptic number.

It is an amenable number.

693981669 is a deficient number, since it is larger than the sum of its proper divisors (280027771).

693981669 is a wasteful number, since it uses less digits than its factorization.

693981669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12175139.

The product of its digits is 3779136, while the sum is 57.

The square root of 693981669 is about 26343.5318247193. The cubic root of 693981669 is about 885.3520550239.

The spelling of 693981669 in words is "six hundred ninety-three million, nine hundred eighty-one thousand, six hundred sixty-nine".