90311651 has 2 divisors, whose sum is σ = 90311652. Its totient is φ = 90311650.

The previous prime is 90311621. The next prime is 90311677. The reversal of 90311651 is 15611309.

It is an a-pointer prime, because the next prime (90311677) can be obtained adding 90311651 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90311651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90311651.

It is not a weakly prime, because it can be changed into another prime (90311621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45155825 + 45155826.

It is an arithmetic number, because the mean of its divisors is an integer number (45155826).

Almost surely, 2^90311651 is an apocalyptic number.

90311651 is a deficient number, since it is larger than the sum of its proper divisors (1).

90311651 is an equidigital number, since it uses as much as digits as its factorization.

90311651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 90311651 is about 9503.2442355229. The cubic root of 90311651 is about 448.6571506859.

The spelling of 90311651 in words is "ninety million, three hundred eleven thousand, six hundred fifty-one".