90425287 has 4 divisors (see below), whose sum is σ = 90607000. Its totient is φ = 90243576.

The previous prime is 90425267. The next prime is 90425303. The reversal of 90425287 is 78252409.

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

It is a cyclic number.

It is not a de Polignac number, because 90425287 - 2¹⁹ = 89900999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90425207) 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, 90108 + ... + 91105.

It is an arithmetic number, because the mean of its divisors is an integer number (22651750).

Almost surely, 2^90425287 is an apocalyptic number.

90425287 is a deficient number, since it is larger than the sum of its proper divisors (181713).

90425287 is a wasteful number, since it uses less digits than its factorization.

90425287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181712.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 90425287 is about 9509.2211563303. The cubic root of 90425287 is about 448.8452483629.

The spelling of 90425287 in words is "ninety million, four hundred twenty-five thousand, two hundred eighty-seven".