97731647 has 16 divisors (see below), whose sum is σ = 108218880. Its totient is φ = 87689952.

The previous prime is 97731643. The next prime is 97731661. The reversal of 97731647 is 74613779.

It is a cyclic number.

It is not a de Polignac number, because 97731647 - 2² = 97731643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 97731598 and 97731607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97731643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200438 + ... + 200924.

It is an arithmetic number, because the mean of its divisors is an integer number (6763680).

Almost surely, 2^97731647 is an apocalyptic number.

97731647 is a deficient number, since it is larger than the sum of its proper divisors (10487233).

97731647 is a wasteful number, since it uses less digits than its factorization.

97731647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902.

The product of its digits is 222264, while the sum is 44.

The square root of 97731647 is about 9885.9317719677. The cubic root of 97731647 is about 460.6224198770.

The spelling of 97731647 in words is "ninety-seven million, seven hundred thirty-one thousand, six hundred forty-seven".