97867391 has 4 divisors (see below), whose sum is σ = 97928112. Its totient is φ = 97806672.

The previous prime is 97867361. The next prime is 97867397. The reversal of 97867391 is 19376879.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19376879 = 23 ⋅842473.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97867391 is a prime.

It is a super-2 number, since 2×97867391² = 19156052442293762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97867397) 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, 27875 + ... + 31188.

It is an arithmetic number, because the mean of its divisors is an integer number (24482028).

Almost surely, 2^97867391 is an apocalyptic number.

97867391 is a deficient number, since it is larger than the sum of its proper divisors (60721).

97867391 is a wasteful number, since it uses less digits than its factorization.

97867391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60720.

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

The square root of 97867391 is about 9892.7949033627. The cubic root of 97867391 is about 460.8355811379.

The spelling of 97867391 in words is "ninety-seven million, eight hundred sixty-seven thousand, three hundred ninety-one".