90975725 has 6 divisors (see below), whose sum is σ = 112809930. Its totient is φ = 72780560.

The previous prime is 90975707. The next prime is 90975737. The reversal of 90975725 is 52757909.

It can be written as a sum of positive squares in 3 ways, for example, as 16826404 + 74149321 = 4102^2 + 8611^2 .

It is not a de Polignac number, because 90975725 - 2¹⁶ = 90910189 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1819490 + ... + 1819539.

It is an arithmetic number, because the mean of its divisors is an integer number (18801655).

Almost surely, 2^90975725 is an apocalyptic number.

It is an amenable number.

90975725 is a deficient number, since it is larger than the sum of its proper divisors (21834205).

90975725 is a wasteful number, since it uses less digits than its factorization.

90975725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3639039 (or 3639034 counting only the distinct ones).

The product of its (nonzero) digits is 198450, while the sum is 44.

The square root of 90975725 is about 9538.1195735847. The cubic root of 90975725 is about 449.7541455389.

The spelling of 90975725 in words is "ninety million, nine hundred seventy-five thousand, seven hundred twenty-five".