97557998 has 4 divisors (see below), whose sum is σ = 146337000. Its totient is φ = 48778998.

The previous prime is 97557991. The next prime is 97558007. The reversal of 97557998 is 89975579.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97557991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24389498 + ... + 24389501.

It is an arithmetic number, because the mean of its divisors is an integer number (36584250).

Almost surely, 2^97557998 is an apocalyptic number.

97557998 is a deficient number, since it is larger than the sum of its proper divisors (48779002).

97557998 is a wasteful number, since it uses less digits than its factorization.

97557998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48779001.

The product of its digits is 7144200, while the sum is 59.

The square root of 97557998 is about 9877.1452353400. The cubic root of 97557998 is about 460.3494477637.

The spelling of 97557998 in words is "ninety-seven million, five hundred fifty-seven thousand, nine hundred ninety-eight".