90015047 has 2 divisors, whose sum is σ = 90015048. Its totient is φ = 90015046.

The previous prime is 90015019. The next prime is 90015067. The reversal of 90015047 is 74051009.

It is a strong prime.

It is an emirp because it is prime and its reverse (74051009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90015047 - 2⁸ = 90014791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90015067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45007523 + 45007524.

It is an arithmetic number, because the mean of its divisors is an integer number (45007524).

Almost surely, 2^90015047 is an apocalyptic number.

90015047 is a deficient number, since it is larger than the sum of its proper divisors (1).

90015047 is an equidigital number, since it uses as much as digits as its factorization.

90015047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 90015047 is about 9487.6259938933. The cubic root of 90015047 is about 448.1654479667.

The spelling of 90015047 in words is "ninety million, fifteen thousand, forty-seven".