90425997 has 32 divisors (see below), whose sum is σ = 141696000. Its totient is φ = 56836080.

The previous prime is 90425987. The next prime is 90426001. The reversal of 90425997 is 79952409.

It is not a de Polignac number, because 90425997 - 2¹⁹ = 89901709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90425987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183922 + ... + 184412.

It is an arithmetic number, because the mean of its divisors is an integer number (4428000).

Almost surely, 2^90425997 is an apocalyptic number.

It is an amenable number.

90425997 is a deficient number, since it is larger than the sum of its proper divisors (51270003).

90425997 is a wasteful number, since it uses less digits than its factorization.

90425997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878 (or 872 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 90425997 is about 9509.2584884417. The cubic root of 90425997 is about 448.8464231055.

The spelling of 90425997 in words is "ninety million, four hundred twenty-five thousand, nine hundred ninety-seven".