697496981 has 4 divisors (see below), whose sum is σ = 697707264. Its totient is φ = 697286700.

The previous prime is 697496963. The next prime is 697496983. The reversal of 697496981 is 189694796.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 697496981 - 2¹⁰ = 697495957 is a prime.

It is a super-2 number, since 2×697496981² = 973004077008228722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 697496981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697496983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100085 + ... + 106826.

It is an arithmetic number, because the mean of its divisors is an integer number (174426816).

Almost surely, 2^697496981 is an apocalyptic number.

It is an amenable number.

697496981 is a deficient number, since it is larger than the sum of its proper divisors (210283).

697496981 is a wasteful number, since it uses less digits than its factorization.

697496981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210282.

The product of its digits is 5878656, while the sum is 59.

The square root of 697496981 is about 26410.1681365341. The cubic root of 697496981 is about 886.8444327812.

The spelling of 697496981 in words is "six hundred ninety-seven million, four hundred ninety-six thousand, nine hundred eighty-one".