97377991 has 8 divisors (see below), whose sum is σ = 99041184. Its totient is φ = 95723040.

The previous prime is 97377971. The next prime is 97377997. The reversal of 97377991 is 19977379.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97377991 is a prime.

It is a pancake number, because a pancake can be divided into 97377991 parts by 13955 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97377997) 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, 24645 + ... + 28321.

It is an arithmetic number, because the mean of its divisors is an integer number (12380148).

Almost surely, 2^97377991 is an apocalyptic number.

97377991 is a deficient number, since it is larger than the sum of its proper divisors (1663193).

97377991 is a wasteful number, since it uses less digits than its factorization.

97377991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4121.

The product of its digits is 750141, while the sum is 52.

The square root of 97377991 is about 9868.0287291840. The cubic root of 97377991 is about 460.0661388833.

The spelling of 97377991 in words is "ninety-seven million, three hundred seventy-seven thousand, nine hundred ninety-one".