97831845 has 24 divisors (see below), whose sum is σ = 169884000. Its totient is φ = 52082016.

The previous prime is 97831841. The next prime is 97831847. The reversal of 97831845 is 54813879.

It is not a de Polignac number, because 97831845 - 2² = 97831841 is a prime.

It is a super-2 number, since 2×97831845² = 19142139792208050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 97831845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97831841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28006 + ... + 31304.

It is an arithmetic number, because the mean of its divisors is an integer number (7078500).

Almost surely, 2^97831845 is an apocalyptic number.

It is an amenable number.

97831845 is a deficient number, since it is larger than the sum of its proper divisors (72052155).

97831845 is a wasteful number, since it uses less digits than its factorization.

97831845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3969 (or 3966 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 97831845 is about 9890.9981801636. The cubic root of 97831845 is about 460.7797816695.

It can be divided in two parts, 9783 and 1845, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 97831845 in words is "ninety-seven million, eight hundred thirty-one thousand, eight hundred forty-five".