90262621 has 2 divisors, whose sum is σ = 90262622. Its totient is φ = 90262620.

The previous prime is 90262591. The next prime is 90262631. The reversal of 90262621 is 12626209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59059225 + 31203396 = 7685^2 + 5586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90262621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90262621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90262631) 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, 45131310 + 45131311.

It is an arithmetic number, because the mean of its divisors is an integer number (45131311).

Almost surely, 2^90262621 is an apocalyptic number.

It is an amenable number.

90262621 is a deficient number, since it is larger than the sum of its proper divisors (1).

90262621 is an equidigital number, since it uses as much as digits as its factorization.

90262621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 90262621 is about 9500.6642399361. The cubic root of 90262621 is about 448.5759443230.

The spelling of 90262621 in words is "ninety million, two hundred sixty-two thousand, six hundred twenty-one".