97953791 has 4 divisors (see below), whose sum is σ = 105488712. Its totient is φ = 90418872.

The previous prime is 97953773. The next prime is 97953827. The reversal of 97953791 is 19735979.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 97953791 - 2¹⁸ = 97691647 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 (97953491) 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, 3767441 + ... + 3767466.

It is an arithmetic number, because the mean of its divisors is an integer number (26372178).

Almost surely, 2^97953791 is an apocalyptic number.

97953791 is a deficient number, since it is larger than the sum of its proper divisors (7534921).

97953791 is a wasteful number, since it uses less digits than its factorization.

97953791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7534920.

The product of its digits is 535815, while the sum is 50.

The square root of 97953791 is about 9897.1607544790. The cubic root of 97953791 is about 460.9711539867.

The spelling of 97953791 in words is "ninety-seven million, nine hundred fifty-three thousand, seven hundred ninety-one".