97886991 has 8 divisors (see below), whose sum is σ = 131063040. Its totient is φ = 64984472.

The previous prime is 97886989. The next prime is 97887001. The reversal of 97886991 is 19968879.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 97886991 - 2¹ = 97886989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97886951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67545 + ... + 68978.

It is an arithmetic number, because the mean of its divisors is an integer number (16382880).

Almost surely, 2^97886991 is an apocalyptic number.

97886991 is a deficient number, since it is larger than the sum of its proper divisors (33176049).

97886991 is a wasteful number, since it uses less digits than its factorization.

97886991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136765.

The product of its digits is 1959552, while the sum is 57.

The square root of 97886991 is about 9893.7854737204. The cubic root of 97886991 is about 460.8663430849.

The spelling of 97886991 in words is "ninety-seven million, eight hundred eighty-six thousand, nine hundred ninety-one".