97975391 has 4 divisors (see below), whose sum is σ = 98310072. Its totient is φ = 97640712.

The previous prime is 97975357. The next prime is 97975399. The reversal of 97975391 is 19357979.

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 97975391 - 2⁶ = 97975327 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 (97975399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166901 + ... + 167486.

It is an arithmetic number, because the mean of its divisors is an integer number (24577518).

Almost surely, 2^97975391 is an apocalyptic number.

97975391 is a deficient number, since it is larger than the sum of its proper divisors (334681).

97975391 is a wasteful number, since it uses less digits than its factorization.

97975391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334680.

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

The square root of 97975391 is about 9898.2519163739. The cubic root of 97975391 is about 461.0050347416.

The spelling of 97975391 in words is "ninety-seven million, nine hundred seventy-five thousand, three hundred ninety-one".