697661481 has 8 divisors (see below), whose sum is σ = 1014780384. Its totient is φ = 422825120.

The previous prime is 697661473. The next prime is 697661509. The reversal of 697661481 is 184166796.

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 697661481 - 2³ = 697661473 is a prime.

It is a super-2 number, since 2×697661481² = 973463084142226722, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 697661481.

It is not an unprimeable number, because it can be changed into a prime (697661401) 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, 10570596 + ... + 10570661.

It is an arithmetic number, because the mean of its divisors is an integer number (126847548).

Almost surely, 2^697661481 is an apocalyptic number.

It is an amenable number.

697661481 is a deficient number, since it is larger than the sum of its proper divisors (317118903).

697661481 is a wasteful number, since it uses less digits than its factorization.

697661481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21141271.

The product of its digits is 435456, while the sum is 48.

The square root of 697661481 is about 26413.2822837299. The cubic root of 697661481 is about 886.9141460779.

The spelling of 697661481 in words is "six hundred ninety-seven million, six hundred sixty-one thousand, four hundred eighty-one".