90279691 has 4 divisors (see below), whose sum is σ = 90299032. Its totient is φ = 90260352.

The previous prime is 90279689. The next prime is 90279727. The reversal of 90279691 is 19697209.

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 90279691 - 2¹ = 90279689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90279641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2140 + ... + 13606.

It is an arithmetic number, because the mean of its divisors is an integer number (22574758).

Almost surely, 2^90279691 is an apocalyptic number.

90279691 is a deficient number, since it is larger than the sum of its proper divisors (19341).

90279691 is a wasteful number, since it uses less digits than its factorization.

90279691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19340.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 90279691 is about 9501.5625557063. The cubic root of 90279691 is about 448.6042199947.

The spelling of 90279691 in words is "ninety million, two hundred seventy-nine thousand, six hundred ninety-one".