696847981 has 4 divisors (see below), whose sum is σ = 713053792. Its totient is φ = 680642172.

The previous prime is 696847927. The next prime is 696847993. The reversal of 696847981 is 189748696.

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 696847981 - 2¹³ = 696839789 is a prime.

It is a super-2 number, since 2×696847981² = 971194217247552722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (696847181) 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, 8102841 + ... + 8102926.

It is an arithmetic number, because the mean of its divisors is an integer number (178263448).

Almost surely, 2^696847981 is an apocalyptic number.

It is an amenable number.

696847981 is a deficient number, since it is larger than the sum of its proper divisors (16205811).

696847981 is a wasteful number, since it uses less digits than its factorization.

696847981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16205810.

The product of its digits is 5225472, while the sum is 58.

The square root of 696847981 is about 26397.8783427760. The cubic root of 696847981 is about 886.5692867188.

The spelling of 696847981 in words is "six hundred ninety-six million, eight hundred forty-seven thousand, nine hundred eighty-one".