90437198623 has 2 divisors, whose sum is σ = 90437198624. Its totient is φ = 90437198622.

The previous prime is 90437198591. The next prime is 90437198627. The reversal of 90437198623 is 32689173409.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90437198623 - 2⁵ = 90437198591 is a prime.

It is a super-2 number, since 2×90437198623² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90437198627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45218599311 + 45218599312.

It is an arithmetic number, because the mean of its divisors is an integer number (45218599312).

Almost surely, 2^90437198623 is an apocalyptic number.

90437198623 is a deficient number, since it is larger than the sum of its proper divisors (1).

90437198623 is an equidigital number, since it uses as much as digits as its factorization.

90437198623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 90437198623 in words is "ninety billion, four hundred thirty-seven million, one hundred ninety-eight thousand, six hundred twenty-three".