90745437 has 32 divisors (see below), whose sum is σ = 129761280. Its totient is φ = 56306880.

The previous prime is 90745433. The next prime is 90745469. The reversal of 90745437 is 73454709.

It is not a de Polignac number, because 90745437 - 2² = 90745433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90745395 and 90745404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90745433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 475012 + ... + 475202.

It is an arithmetic number, because the mean of its divisors is an integer number (4055040).

Almost surely, 2^90745437 is an apocalyptic number.

It is an amenable number.

90745437 is a deficient number, since it is larger than the sum of its proper divisors (39015843).

90745437 is a wasteful number, since it uses less digits than its factorization.

90745437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393.

The product of its (nonzero) digits is 105840, while the sum is 39.

The square root of 90745437 is about 9526.0399432293. The cubic root of 90745437 is about 449.3743354389.

The spelling of 90745437 in words is "ninety million, seven hundred forty-five thousand, four hundred thirty-seven".