90077725 has 12 divisors (see below), whose sum is σ = 111837460. Its totient is φ = 71971200.

The previous prime is 90077717. The next prime is 90077731. The reversal of 90077725 is 52777009.

It can be written as a sum of positive squares in 6 ways, for example, as 9903609 + 80174116 = 3147^2 + 8954^2 .

It is not a de Polignac number, because 90077725 - 2³ = 90077717 is a prime.

It is a super-2 number, since 2×90077725² = 16227993082351250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23761 + ... + 27289.

Almost surely, 2^90077725 is an apocalyptic number.

It is an amenable number.

90077725 is a deficient number, since it is larger than the sum of its proper divisors (21759735).

90077725 is a wasteful number, since it uses less digits than its factorization.

90077725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4560 (or 4555 counting only the distinct ones).

The product of its (nonzero) digits is 30870, while the sum is 37.

The square root of 90077725 is about 9490.9285636338. The cubic root of 90077725 is about 448.2694439008.

The spelling of 90077725 in words is "ninety million, seventy-seven thousand, seven hundred twenty-five".