99670091 has 2 divisors, whose sum is σ = 99670092. Its totient is φ = 99670090.

The previous prime is 99670079. The next prime is 99670097. The reversal of 99670091 is 19007699.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99670091 - 2⁶ = 99670027 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99670097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49835045 + 49835046.

It is an arithmetic number, because the mean of its divisors is an integer number (49835046).

Almost surely, 2^99670091 is an apocalyptic number.

99670091 is a deficient number, since it is larger than the sum of its proper divisors (1).

99670091 is an equidigital number, since it uses as much as digits as its factorization.

99670091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 99670091 is about 9983.4909225180. The cubic root of 99670091 is about 463.6478870308.

The spelling of 99670091 in words is "ninety-nine million, six hundred seventy thousand, ninety-one".