90408511 has 2 divisors, whose sum is σ = 90408512. Its totient is φ = 90408510.

The previous prime is 90408509. The next prime is 90408523. The reversal of 90408511 is 11580409.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90408511 - 2¹ = 90408509 is a prime.

It is a super-2 number, since 2×90408511² = 16347397722474242, which contains 22 as substring.

Together with 90408509, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 90408511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90408911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45204255 + 45204256.

It is an arithmetic number, because the mean of its divisors is an integer number (45204256).

Almost surely, 2^90408511 is an apocalyptic number.

90408511 is a deficient number, since it is larger than the sum of its proper divisors (1).

90408511 is an equidigital number, since it uses as much as digits as its factorization.

90408511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 90408511 is about 9508.3390242460. The cubic root of 90408511 is about 448.8174895585.

The spelling of 90408511 in words is "ninety million, four hundred eight thousand, five hundred eleven".