90750637 has 4 divisors (see below), whose sum is σ = 90773500. Its totient is φ = 90727776.

The previous prime is 90750619. The next prime is 90750661. The reversal of 90750637 is 73605709.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73605709 = 1733 ⋅42473.

It can be written as a sum of positive squares in 2 ways, for example, as 2653641 + 88096996 = 1629^2 + 9386^2 .

It is a cyclic number.

It is not a de Polignac number, because 90750637 - 2⁷ = 90750509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90750596 and 90750605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90751637) 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, 3762 + ... + 13987.

It is an arithmetic number, because the mean of its divisors is an integer number (22693375).

Almost surely, 2^90750637 is an apocalyptic number.

It is an amenable number.

90750637 is a deficient number, since it is larger than the sum of its proper divisors (22863).

90750637 is a wasteful number, since it uses less digits than its factorization.

90750637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22862.

The product of its (nonzero) digits is 39690, while the sum is 37.

The square root of 90750637 is about 9526.3128753994. The cubic root of 90750637 is about 449.3829187976.

The spelling of 90750637 in words is "ninety million, seven hundred fifty thousand, six hundred thirty-seven".