90425437 has 4 divisors (see below), whose sum is σ = 91357756. Its totient is φ = 89493120.

The previous prime is 90425407. The next prime is 90425441. The reversal of 90425437 is 73452409.

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

It can be written as a sum of positive squares in 2 ways, for example, as 41229241 + 49196196 = 6421^2 + 7014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90425437 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 (90425407) 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, 466014 + ... + 466207.

It is an arithmetic number, because the mean of its divisors is an integer number (22839439).

Almost surely, 2^90425437 is an apocalyptic number.

90425437 is a gapful number since it is divisible by the number (97) formed by its first and last digit.

It is an amenable number.

90425437 is a deficient number, since it is larger than the sum of its proper divisors (932319).

90425437 is an equidigital number, since it uses as much as digits as its factorization.

90425437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932318.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 90425437 is about 9509.2290434083. The cubic root of 90425437 is about 448.8454965485.

The spelling of 90425437 in words is "ninety million, four hundred twenty-five thousand, four hundred thirty-seven".