97561408 has 28 divisors (see below), whose sum is σ = 221256352. Its totient is φ = 41811840.

The previous prime is 97561391. The next prime is 97561411. The reversal of 97561408 is 80416579.

It is a tau number, because it is divible by the number of its divisors (28).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 108438 + ... + 109333.

Almost surely, 2^97561408 is an apocalyptic number.

It is an amenable number.

97561408 is an abundant number, since it is smaller than the sum of its proper divisors (123694944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97561408 is a wasteful number, since it uses less digits than its factorization.

97561408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217790 (or 217780 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 97561408 is about 9877.3178545595. The cubic root of 97561408 is about 460.3548113196.

It can be divided in two parts, 97561 and 408, that added together give a square (97969 = 313²).

The spelling of 97561408 in words is "ninety-seven million, five hundred sixty-one thousand, four hundred eight".