99670931 has 2 divisors, whose sum is σ = 99670932. Its totient is φ = 99670930.

The previous prime is 99670919. The next prime is 99670943. The reversal of 99670931 is 13907699.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (99670919) and next prime (99670943).

It is a cyclic number.

It is not a de Polignac number, because 99670931 - 2¹⁸ = 99408787 is a prime.

It is a super-2 number, since 2×99670931² = 19868588972813522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99570931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49835465 + 49835466.

It is an arithmetic number, because the mean of its divisors is an integer number (49835466).

Almost surely, 2^99670931 is an apocalyptic number.

99670931 is a deficient number, since it is larger than the sum of its proper divisors (1).

99670931 is an equidigital number, since it uses as much as digits as its factorization.

99670931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 99670931 is about 9983.5329918822. The cubic root of 99670931 is about 463.6491895383.

The spelling of 99670931 in words is "ninety-nine million, six hundred seventy thousand, nine hundred thirty-one".