97142391 has 12 divisors (see below), whose sum is σ = 140500360. Its totient is φ = 64676880.

The previous prime is 97142351. The next prime is 97142399. The reversal of 97142391 is 19324179.

It is not a de Polignac number, because 97142391 - 2⁷ = 97142263 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 (97142399) 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, 645 + ... + 13953.

Almost surely, 2^97142391 is an apocalyptic number.

97142391 is a deficient number, since it is larger than the sum of its proper divisors (43357969).

97142391 is a wasteful number, since it uses less digits than its factorization.

97142391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14126 (or 14123 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 97142391 is about 9856.0839586521. The cubic root of 97142391 is about 459.6948054349.

The spelling of 97142391 in words is "ninety-seven million, one hundred forty-two thousand, three hundred ninety-one".