697663961 has 4 divisors (see below), whose sum is σ = 701944272. Its totient is φ = 693383652.

The previous prime is 697663937. The next prime is 697663997. The reversal of 697663961 is 169366796.

It is a happy number.

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 697663961 - 2¹⁰ = 697662937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (697662961) 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, 2139911 + ... + 2140236.

It is an arithmetic number, because the mean of its divisors is an integer number (175486068).

Almost surely, 2^697663961 is an apocalyptic number.

It is an amenable number.

697663961 is a deficient number, since it is larger than the sum of its proper divisors (4280311).

697663961 is a wasteful number, since it uses less digits than its factorization.

697663961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4280310.

The product of its digits is 2204496, while the sum is 53.

The square root of 697663961 is about 26413.3292297658. The cubic root of 697663961 is about 886.9151969909.

The spelling of 697663961 in words is "six hundred ninety-seven million, six hundred sixty-three thousand, nine hundred sixty-one".