97139867 has 4 divisors (see below), whose sum is σ = 105970776. Its totient is φ = 88308960.

The previous prime is 97139827. The next prime is 97139869. The reversal of 97139867 is 76893179.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76893179 = 11 ⋅6990289.

It is a cyclic number.

It is not a de Polignac number, because 97139867 - 2¹⁰ = 97138843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97139869) 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, 4415438 + ... + 4415459.

It is an arithmetic number, because the mean of its divisors is an integer number (26492694).

Almost surely, 2^97139867 is an apocalyptic number.

97139867 is a deficient number, since it is larger than the sum of its proper divisors (8830909).

97139867 is a wasteful number, since it uses less digits than its factorization.

97139867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8830908.

The product of its digits is 571536, while the sum is 50.

The square root of 97139867 is about 9855.9559150800. The cubic root of 97139867 is about 459.6908240638.

The spelling of 97139867 in words is "ninety-seven million, one hundred thirty-nine thousand, eight hundred sixty-seven".