90506537 has 8 divisors (see below), whose sum is σ = 100835712. Its totient is φ = 80527600.

The previous prime is 90506527. The next prime is 90506539. The reversal of 90506537 is 73560509.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90506537 - 2⁶ = 90506473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90506497 and 90506506.

It is not an unprimeable number, because it can be changed into a prime (90506539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87014 + ... + 88047.

It is an arithmetic number, because the mean of its divisors is an integer number (12604464).

Almost surely, 2^90506537 is an apocalyptic number.

It is an amenable number.

90506537 is a deficient number, since it is larger than the sum of its proper divisors (10329175).

90506537 is a wasteful number, since it uses less digits than its factorization.

90506537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175119.

The product of its (nonzero) digits is 28350, while the sum is 35.

The square root of 90506537 is about 9513.4923661083. The cubic root of 90506537 is about 448.9796420351.

The spelling of 90506537 in words is "ninety million, five hundred six thousand, five hundred thirty-seven".