90968291 has 4 divisors (see below), whose sum is σ = 93902784. Its totient is φ = 88033800.

The previous prime is 90968287. The next prime is 90968303. The reversal of 90968291 is 19286909.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19286909 = 1801 ⋅10709.

It is not a de Polignac number, because 90968291 - 2² = 90968287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90968201) 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, 1467200 + ... + 1467261.

It is an arithmetic number, because the mean of its divisors is an integer number (23475696).

Almost surely, 2^90968291 is an apocalyptic number.

90968291 is a deficient number, since it is larger than the sum of its proper divisors (2934493).

90968291 is a wasteful number, since it uses less digits than its factorization.

90968291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934492.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 90968291 is about 9537.7298661684. The cubic root of 90968291 is about 449.7418947860.

The spelling of 90968291 in words is "ninety million, nine hundred sixty-eight thousand, two hundred ninety-one".