90798511 has 4 divisors (see below), whose sum is σ = 95577400. Its totient is φ = 86019624.

The previous prime is 90798509. The next prime is 90798527. The reversal of 90798511 is 11589709.

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: 11589709 = 421 ⋅27529.

It is a cyclic number.

It is not a de Polignac number, because 90798511 - 2¹ = 90798509 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 (90798541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2389416 + ... + 2389453.

It is an arithmetic number, because the mean of its divisors is an integer number (23894350).

Almost surely, 2^90798511 is an apocalyptic number.

90798511 is a deficient number, since it is larger than the sum of its proper divisors (4778889).

90798511 is a wasteful number, since it uses less digits than its factorization.

90798511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4778888.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 90798511 is about 9528.8252686257. The cubic root of 90798511 is about 449.4619264189.

The spelling of 90798511 in words is "ninety million, seven hundred ninety-eight thousand, five hundred eleven".