990230511 has 4 divisors (see below), whose sum is σ = 1320307352. Its totient is φ = 660153672.

The previous prime is 990230503. The next prime is 990230513. The reversal of 990230511 is 115032099.

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

It is not a de Polignac number, because 990230511 - 2³ = 990230503 is a prime.

It is a super-2 number, since 2×990230511² = 1961112929830642242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990230513) 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, 165038416 + ... + 165038421.

It is an arithmetic number, because the mean of its divisors is an integer number (330076838).

Almost surely, 2^990230511 is an apocalyptic number.

990230511 is a deficient number, since it is larger than the sum of its proper divisors (330076841).

990230511 is a wasteful number, since it uses less digits than its factorization.

990230511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330076840.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 990230511 is about 31467.9282921517. The cubic root of 990230511 is about 996.7328409634.

The spelling of 990230511 in words is "nine hundred ninety million, two hundred thirty thousand, five hundred eleven".