90250057 has 4 divisors (see below), whose sum is σ = 95000080. Its totient is φ = 85500036.

The previous prime is 90250051. The next prime is 90250063. The reversal of 90250057 is 75005209.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75005209 = 2213 ⋅33893.

It is an interprime number because it is at equal distance from previous prime (90250051) and next prime (90250063).

It is a cyclic number.

It is not a de Polignac number, because 90250057 - 2¹¹ = 90248009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90250051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2374983 + ... + 2375020.

It is an arithmetic number, because the mean of its divisors is an integer number (23750020).

Almost surely, 2^90250057 is an apocalyptic number.

It is an amenable number.

90250057 is a deficient number, since it is larger than the sum of its proper divisors (4750023).

90250057 is a wasteful number, since it uses less digits than its factorization.

90250057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4750022.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 90250057 is about 9500.0029999995. The cubic root of 90250057 is about 448.5551303559. Note that the first 3 decimals are identical.

The spelling of 90250057 in words is "ninety million, two hundred fifty thousand, fifty-seven".