696563721 has 24 divisors (see below), whose sum is σ = 1152956480. Its totient is φ = 396972576.

The previous prime is 696563713. The next prime is 696563741. The reversal of 696563721 is 127365696.

696563721 is a `hidden beast` number, since 6 + 9 + 6 + 5 + 637 + 2 + 1 = 666.

It is not a de Polignac number, because 696563721 - 2³ = 696563713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (696563741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9291 + ... + 38463.

Almost surely, 2^696563721 is an apocalyptic number.

It is an amenable number.

696563721 is a deficient number, since it is larger than the sum of its proper divisors (456392759).

696563721 is a wasteful number, since it uses less digits than its factorization.

696563721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29565 (or 29562 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 696563721 is about 26392.4936487631. The cubic root of 696563721 is about 886.4487197908.

The spelling of 696563721 in words is "six hundred ninety-six million, five hundred sixty-three thousand, seven hundred twenty-one".