90509011 has 2 divisors, whose sum is σ = 90509012. Its totient is φ = 90509010.

The previous prime is 90508991. The next prime is 90509033. The reversal of 90509011 is 11090509.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90509011 is a prime.

It is not a weakly prime, because it can be changed into another prime (90501011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45254505 + 45254506.

It is an arithmetic number, because the mean of its divisors is an integer number (45254506).

Almost surely, 2^90509011 is an apocalyptic number.

90509011 is a deficient number, since it is larger than the sum of its proper divisors (1).

90509011 is an equidigital number, since it uses as much as digits as its factorization.

90509011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 90509011 is about 9513.6223910769. The cubic root of 90509011 is about 448.9837329570.

The spelling of 90509011 in words is "ninety million, five hundred nine thousand, eleven".