89951791 has 2 divisors, whose sum is σ = 89951792. Its totient is φ = 89951790.

The previous prime is 89951761. The next prime is 89951803. The reversal of 89951791 is 19715998.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89951791 - 2¹⁵ = 89919023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89951761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44975895 + 44975896.

It is an arithmetic number, because the mean of its divisors is an integer number (44975896).

Almost surely, 2^89951791 is an apocalyptic number.

89951791 is a deficient number, since it is larger than the sum of its proper divisors (1).

89951791 is an equidigital number, since it uses as much as digits as its factorization.

89951791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 49.

The square root of 89951791 is about 9484.2918027652. The cubic root of 89951791 is about 448.0604440528.

The spelling of 89951791 in words is "eighty-nine million, nine hundred fifty-one thousand, seven hundred ninety-one".