90493387 has 4 divisors (see below), whose sum is σ = 91069936. Its totient is φ = 89916840.

The previous prime is 90493373. The next prime is 90493399. The reversal of 90493387 is 78339409.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90493387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90493307) 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, 288039 + ... + 288352.

It is an arithmetic number, because the mean of its divisors is an integer number (22767484).

Almost surely, 2^90493387 is an apocalyptic number.

90493387 is a deficient number, since it is larger than the sum of its proper divisors (576549).

90493387 is a wasteful number, since it uses less digits than its factorization.

90493387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576548.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 90493387 is about 9512.8012173071. The cubic root of 90493387 is about 448.9578963931.

The spelling of 90493387 in words is "ninety million, four hundred ninety-three thousand, three hundred eighty-seven".