90187097 has 48 divisors (see below), whose sum is σ = 125866944. Its totient is φ = 63504000.

The previous prime is 90187049. The next prime is 90187099. The reversal of 90187097 is 79078109.

It is not a de Polignac number, because 90187097 - 2⁶ = 90187033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90187099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 427322 + ... + 427532.

It is an arithmetic number, because the mean of its divisors is an integer number (2622228).

Almost surely, 2^90187097 is an apocalyptic number.

It is an amenable number.

90187097 is a deficient number, since it is larger than the sum of its proper divisors (35679847).

90187097 is a wasteful number, since it uses less digits than its factorization.

90187097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 303 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 90187097 is about 9496.6887387131. The cubic root of 90187097 is about 448.4507994866.

The spelling of 90187097 in words is "ninety million, one hundred eighty-seven thousand, ninety-seven".