90862879 has 4 divisors (see below), whose sum is σ = 91263384. Its totient is φ = 90462376.

The previous prime is 90862873. The next prime is 90862897. The reversal of 90862879 is 97826809.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97826809 = 4951 ⋅19759.

It is a cyclic number.

It is not a de Polignac number, because 90862879 - 2¹⁵ = 90830111 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 (90862873) 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, 199912 + ... + 200365.

It is an arithmetic number, because the mean of its divisors is an integer number (22815846).

Almost surely, 2^90862879 is an apocalyptic number.

90862879 is a deficient number, since it is larger than the sum of its proper divisors (400505).

90862879 is a wasteful number, since it uses less digits than its factorization.

90862879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400504.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 90862879 is about 9532.2022114515. The cubic root of 90862879 is about 449.5681107281.

The spelling of 90862879 in words is "ninety million, eight hundred sixty-two thousand, eight hundred seventy-nine".