90947391 has 8 divisors (see below), whose sum is σ = 121307520. Its totient is φ = 60609432.

The previous prime is 90947377. The next prime is 90947413. The reversal of 90947391 is 19374909.

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

It is not a de Polignac number, because 90947391 - 2⁶ = 90947327 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90947291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11676 + ... + 17838.

It is an arithmetic number, because the mean of its divisors is an integer number (15163440).

Almost surely, 2^90947391 is an apocalyptic number.

90947391 is a deficient number, since it is larger than the sum of its proper divisors (30360129).

90947391 is a wasteful number, since it uses less digits than its factorization.

90947391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11085.

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 90947391 is about 9536.6341546690. The cubic root of 90947391 is about 449.7074493565.

The spelling of 90947391 in words is "ninety million, nine hundred forty-seven thousand, three hundred ninety-one".