697743621 has 12 divisors (see below), whose sum is σ = 1008467200. Its totient is φ = 464878440.

The previous prime is 697743619. The next prime is 697743643. The reversal of 697743621 is 126347796.

It is not a de Polignac number, because 697743621 - 2¹ = 697743619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697741621) 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, 7525 + ... + 38106.

Almost surely, 2^697743621 is an apocalyptic number.

It is an amenable number.

697743621 is a deficient number, since it is larger than the sum of its proper divisors (310723579).

697743621 is a wasteful number, since it uses less digits than its factorization.

697743621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47336 (or 47333 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 697743621 is about 26414.8371374877. The cubic root of 697743621 is about 886.9489520074.

The spelling of 697743621 in words is "six hundred ninety-seven million, seven hundred forty-three thousand, six hundred twenty-one".