91950289 has 4 divisors (see below), whose sum is σ = 93209956. Its totient is φ = 90690624.

The previous prime is 91950281. The next prime is 91950293. The reversal of 91950289 is 98205919.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56130064 + 35820225 = 7492^2 + 5985^2 .

It is a cyclic number.

It is not a de Polignac number, because 91950289 - 2³ = 91950281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91950281) 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, 629724 + ... + 629869.

It is an arithmetic number, because the mean of its divisors is an integer number (23302489).

Almost surely, 2^91950289 is an apocalyptic number.

It is an amenable number.

91950289 is a deficient number, since it is larger than the sum of its proper divisors (1259667).

91950289 is a wasteful number, since it uses less digits than its factorization.

91950289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259666.

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 91950289 is about 9589.0713314690. The cubic root of 91950289 is about 451.3544197596.

The spelling of 91950289 in words is "ninety-one million, nine hundred fifty thousand, two hundred eighty-nine".