90025505 has 4 divisors (see below), whose sum is σ = 108030612. Its totient is φ = 72020400.

The previous prime is 90025499. The next prime is 90025511. The reversal of 90025505 is 50552009.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (90025499) and next prime (90025511).

It can be written as a sum of positive squares in 2 ways, for example, as 10387729 + 79637776 = 3223^2 + 8924^2 .

It is not a de Polignac number, because 90025505 - 2²² = 85831201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9002546 + ... + 9002555.

It is an arithmetic number, because the mean of its divisors is an integer number (27007653).

Almost surely, 2^90025505 is an apocalyptic number.

It is an amenable number.

90025505 is a deficient number, since it is larger than the sum of its proper divisors (18005107).

90025505 is a wasteful number, since it uses less digits than its factorization.

90025505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18005106.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 90025505 is about 9488.1771168123. The cubic root of 90025505 is about 448.1828033345.

The spelling of 90025505 in words is "ninety million, twenty-five thousand, five hundred five".