91090298 has 8 divisors (see below), whose sum is σ = 147145908. Its totient is φ = 42041664.

The previous prime is 91090291. The next prime is 91090331. The reversal of 91090298 is 89209019.

It can be written as a sum of positive squares in 2 ways, for example, as 89737729 + 1352569 = 9473^2 + 1163^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (91090291) 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, 1751711 + ... + 1751762.

Almost surely, 2^91090298 is an apocalyptic number.

91090298 is a deficient number, since it is larger than the sum of its proper divisors (56055610).

91090298 is a wasteful number, since it uses less digits than its factorization.

91090298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3503488.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 91090298 is about 9544.1237418634. The cubic root of 91090298 is about 449.9428701136.

The spelling of 91090298 in words is "ninety-one million, ninety thousand, two hundred ninety-eight".