97557621 has 32 divisors (see below), whose sum is σ = 153446400. Its totient is φ = 53981760.

The previous prime is 97557613. The next prime is 97557659. The reversal of 97557621 is 12675579.

It is not a de Polignac number, because 97557621 - 2³ = 97557613 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97557661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87415 + ... + 88523.

It is an arithmetic number, because the mean of its divisors is an integer number (4795200).

Almost surely, 2^97557621 is an apocalyptic number.

It is an amenable number.

97557621 is a deficient number, since it is larger than the sum of its proper divisors (55888779).

97557621 is a wasteful number, since it uses less digits than its factorization.

97557621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249.

The product of its digits is 132300, while the sum is 42.

The square root of 97557621 is about 9877.1261508599. The cubic root of 97557621 is about 460.3488547763.

The spelling of 97557621 in words is "ninety-seven million, five hundred fifty-seven thousand, six hundred twenty-one".