90472919 has 2 divisors, whose sum is σ = 90472920. Its totient is φ = 90472918.

The previous prime is 90472913. The next prime is 90472939. The reversal of 90472919 is 91927409.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90472919 is a prime.

It is a super-2 number, since 2×90472919² = 16370698144761122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90472913) 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, 45236459 + 45236460.

It is an arithmetic number, because the mean of its divisors is an integer number (45236460).

Almost surely, 2^90472919 is an apocalyptic number.

90472919 is a deficient number, since it is larger than the sum of its proper divisors (1).

90472919 is an equidigital number, since it uses as much as digits as its factorization.

90472919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 90472919 is about 9511.7253429649. The cubic root of 90472919 is about 448.9240450682.

The spelling of 90472919 in words is "ninety million, four hundred seventy-two thousand, nine hundred nineteen".