97515949 has 4 divisors (see below), whose sum is σ = 98379036. Its totient is φ = 96652864.

The previous prime is 97515931. The next prime is 97515989. The reversal of 97515949 is 94951579.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1671849 + 95844100 = 1293^2 + 9790^2 .

It is a cyclic number.

It is not a de Polignac number, because 97515949 - 2⁹ = 97515437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97515989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431374 + ... + 431599.

It is an arithmetic number, because the mean of its divisors is an integer number (24594759).

Almost surely, 2^97515949 is an apocalyptic number.

It is an amenable number.

97515949 is a deficient number, since it is larger than the sum of its proper divisors (863087).

97515949 is a wasteful number, since it uses less digits than its factorization.

97515949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863086.

The product of its digits is 510300, while the sum is 49.

The square root of 97515949 is about 9875.0164050497. The cubic root of 97515949 is about 460.2832990245.

The spelling of 97515949 in words is "ninety-seven million, five hundred fifteen thousand, nine hundred forty-nine".