90909357481819 has 2 divisors, whose sum is σ = 90909357481820. Its totient is φ = 90909357481818.

The previous prime is 90909357481619. The next prime is 90909357481853. The reversal of 90909357481819 is 91818475390909.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90909357481819 is a prime.

It is a super-2 number, since 2×90909357481819² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90909357481879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45454678740909 + 45454678740910.

It is an arithmetic number, because the mean of its divisors is an integer number (45454678740910).

Almost surely, 2^{90909357481819} is an apocalyptic number.

90909357481819 is a deficient number, since it is larger than the sum of its proper divisors (1).

90909357481819 is an equidigital number, since it uses as much as digits as its factorization.

90909357481819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 176359680, while the sum is 73.

The spelling of 90909357481819 in words is "ninety trillion, nine hundred nine billion, three hundred fifty-seven million, four hundred eighty-one thousand, eight hundred nineteen".