990234089 has 8 divisors (see below), whose sum is σ = 1081426752. Its totient is φ = 901187280.

The previous prime is 990234053. The next prime is 990234097. The reversal of 990234089 is 980432099.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990234089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990231089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535499 + ... + 537344.

It is an arithmetic number, because the mean of its divisors is an integer number (135178344).

Almost surely, 2^990234089 is an apocalyptic number.

It is an amenable number.

990234089 is a deficient number, since it is larger than the sum of its proper divisors (91192663).

990234089 is a wasteful number, since it uses less digits than its factorization.

990234089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072927.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 990234089 is about 31467.9851436345. The cubic root of 990234089 is about 996.7340414602.

The spelling of 990234089 in words is "nine hundred ninety million, two hundred thirty-four thousand, eighty-nine".