990955143 has 24 divisors (see below), whose sum is σ = 1567846800. Its totient is φ = 600332544.

The previous prime is 990955129. The next prime is 990955159. The reversal of 990955143 is 341559099.

It is a happy number.

990955143 is a `hidden beast` number, since 9 + 90 + 9 + 551 + 4 + 3 = 666.

It is not a de Polignac number, because 990955143 - 2⁵ = 990955111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990955193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107233 + ... + 116106.

It is an arithmetic number, because the mean of its divisors is an integer number (65326950).

Almost surely, 2^990955143 is an apocalyptic number.

990955143 is a deficient number, since it is larger than the sum of its proper divisors (576891657).

990955143 is a wasteful number, since it uses less digits than its factorization.

990955143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223391 (or 223388 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 45.

The square root of 990955143 is about 31479.4400045490. The cubic root of 990955143 is about 996.9759117756.

The spelling of 990955143 in words is "nine hundred ninety million, nine hundred fifty-five thousand, one hundred forty-three".