90507 has 4 divisors (see below), whose sum is σ = 120680.
Its totient is φ = 60336.
The previous prime is 90499. The next prime is 90511. The reversal of 90507 is 70509.
It is a semiprime because it is the product of two primes.
It is not a de Polignac number, because 90507 - 23 = 90499 is a prime.
It is a D-number.
It is an alternating number because its digits alternate between odd and even.
It is a Duffinian number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 90507.
It is not an unprimeable number, because it can be changed into a prime (90527) 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, 15082 + ... + 15087.
It is an arithmetic number, because the mean of its divisors is an integer number (30170).
290507 is an apocalyptic number.
90507 is a deficient number, since it is larger than the sum of its proper divisors (30173).
90507 is a wasteful number, since it uses less digits than its factorization.
90507 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 30172.
The product of its (nonzero) digits is 315, while the sum is 21.
The square root of 90507 is about 300.8438132985.
The cubic root of 90507 is about 44.8980407642.
The spelling of 90507 in words is "ninety thousand, five hundred seven".