97749971 has 12 divisors (see below), whose sum is σ = 107915832. Its totient is φ = 88535700.

The previous prime is 97749947. The next prime is 97749991. The reversal of 97749971 is 17994779.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a de Polignac number, because none of the positive numbers 2^k-97749971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97749901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 360566 + ... + 360836.

It is an arithmetic number, because the mean of its divisors is an integer number (8992986).

Almost surely, 2^97749971 is an apocalyptic number.

97749971 is a deficient number, since it is larger than the sum of its proper divisors (10165861).

97749971 is an frugal number, since it uses more digits than its factorization.

97749971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575 (or 282 counting only the distinct ones).

The product of its digits is 1000188, while the sum is 53.

The square root of 97749971 is about 9886.8585000494. The cubic root of 97749971 is about 460.6512059049.

The spelling of 97749971 in words is "ninety-seven million, seven hundred forty-nine thousand, nine hundred seventy-one".