97919131 has 4 divisors (see below), whose sum is σ = 100565632. Its totient is φ = 95272632.

The previous prime is 97919117. The next prime is 97919137. The reversal of 97919131 is 13191979.

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

It is a de Polignac number, because none of the positive numbers 2^k-97919131 is a prime.

It is a super-2 number, since 2×97919131² = 19176312431590322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97919137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1323195 + ... + 1323268.

It is an arithmetic number, because the mean of its divisors is an integer number (25141408).

Almost surely, 2^97919131 is an apocalyptic number.

97919131 is a deficient number, since it is larger than the sum of its proper divisors (2646501).

97919131 is a wasteful number, since it uses less digits than its factorization.

97919131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2646500.

The product of its digits is 15309, while the sum is 40.

The square root of 97919131 is about 9895.4095923312. The cubic root of 97919131 is about 460.9167775137.

The spelling of 97919131 in words is "ninety-seven million, nine hundred nineteen thousand, one hundred thirty-one".