97420751 has 4 divisors (see below), whose sum is σ = 97500000. Its totient is φ = 97341504.

The previous prime is 97420711. The next prime is 97420759. The reversal of 97420751 is 15702479.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15702479 = 13 ⋅1207883.

It is a cyclic number.

It is not a de Polignac number, because 97420751 - 2¹⁰ = 97419727 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 (97420759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37751 + ... + 40248.

It is an arithmetic number, because the mean of its divisors is an integer number (24375000).

Almost surely, 2^97420751 is an apocalyptic number.

97420751 is a deficient number, since it is larger than the sum of its proper divisors (79249).

97420751 is a wasteful number, since it uses less digits than its factorization.

97420751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79248.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 97420751 is about 9870.1950841916. The cubic root of 97420751 is about 460.1334694615.

The spelling of 97420751 in words is "ninety-seven million, four hundred twenty thousand, seven hundred fifty-one".