90831727 has 4 divisors (see below), whose sum is σ = 103807696. Its totient is φ = 77855760.

The previous prime is 90831721. The next prime is 90831743. The reversal of 90831727 is 72713809.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72713809 = 7 ⋅10387687.

It is a cyclic number.

It is not a de Polignac number, because 90831727 - 2⁷ = 90831599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90831721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6487974 + ... + 6487987.

It is an arithmetic number, because the mean of its divisors is an integer number (25951924).

Almost surely, 2^90831727 is an apocalyptic number.

90831727 is a deficient number, since it is larger than the sum of its proper divisors (12975969).

90831727 is a wasteful number, since it uses less digits than its factorization.

90831727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12975968.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 90831727 is about 9530.5680313400. The cubic root of 90831727 is about 449.5167272707.

The spelling of 90831727 in words is "ninety million, eight hundred thirty-one thousand, seven hundred twenty-seven".