90667291 has 16 divisors (see below), whose sum is σ = 107815680. Its totient is φ = 75157920.

The previous prime is 90667271. The next prime is 90667301. The reversal of 90667291 is 19276609.

It is a cyclic number.

It is not a de Polignac number, because 90667291 - 2⁷ = 90667163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90667201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8050 + ... + 15688.

It is an arithmetic number, because the mean of its divisors is an integer number (6738480).

Almost surely, 2^90667291 is an apocalyptic number.

90667291 is a deficient number, since it is larger than the sum of its proper divisors (17148389).

90667291 is a wasteful number, since it uses less digits than its factorization.

90667291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7746.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 90667291 is about 9521.9373553915. The cubic root of 90667291 is about 449.2453045544.

The spelling of 90667291 in words is "ninety million, six hundred sixty-seven thousand, two hundred ninety-one".