90726491 has 4 divisors (see below), whose sum is σ = 93653184. Its totient is φ = 87799800.

The previous prime is 90726473. The next prime is 90726521. The reversal of 90726491 is 19462709.

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

It is a cyclic number.

It is not a de Polignac number, because 90726491 - 2¹⁴ = 90710107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90720491) 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, 1463300 + ... + 1463361.

It is an arithmetic number, because the mean of its divisors is an integer number (23413296).

Almost surely, 2^90726491 is an apocalyptic number.

90726491 is a deficient number, since it is larger than the sum of its proper divisors (2926693).

90726491 is a wasteful number, since it uses less digits than its factorization.

90726491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2926692.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 90726491 is about 9525.0454592091. The cubic root of 90726491 is about 449.3430595275.

The spelling of 90726491 in words is "ninety million, seven hundred twenty-six thousand, four hundred ninety-one".