90165047 has 12 divisors (see below), whose sum is σ = 105719040. Its totient is φ = 76670496.

The previous prime is 90165017. The next prime is 90165071. The reversal of 90165047 is 74056109.

It is a happy number.

It is not a de Polignac number, because 90165047 - 2⁸ = 90164791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90165007) 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 in 11 ways as a sum of consecutive naturals, for example, 1022 + ... + 13467.

It is an arithmetic number, because the mean of its divisors is an integer number (8809920).

Almost surely, 2^90165047 is an apocalyptic number.

90165047 is a deficient number, since it is larger than the sum of its proper divisors (15553993).

90165047 is a wasteful number, since it uses less digits than its factorization.

90165047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14630 (or 14623 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 90165047 is about 9495.5277367822. The cubic root of 90165047 is about 448.4142490027.

The spelling of 90165047 in words is "ninety million, one hundred sixty-five thousand, forty-seven".