89918651 has 2 divisors, whose sum is σ = 89918652. Its totient is φ = 89918650.

The previous prime is 89918641. The next prime is 89918663. The reversal of 89918651 is 15681998.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89918651 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 89918596 and 89918605.

It is not a weakly prime, because it can be changed into another prime (89918611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44959325 + 44959326.

It is an arithmetic number, because the mean of its divisors is an integer number (44959326).

Almost surely, 2^89918651 is an apocalyptic number.

89918651 is a deficient number, since it is larger than the sum of its proper divisors (1).

89918651 is an equidigital number, since it uses as much as digits as its factorization.

89918651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 47.

The square root of 89918651 is about 9482.5445424738. The cubic root of 89918651 is about 448.0054125489.

The spelling of 89918651 in words is "eighty-nine million, nine hundred eighteen thousand, six hundred fifty-one".