990620165 has 8 divisors (see below), whose sum is σ = 1188921888. Its totient is φ = 792377680.

The previous prime is 990620161. The next prime is 990620173. The reversal of 990620165 is 561026099.

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

It is not a de Polignac number, because 990620165 - 2² = 990620161 is a prime.

It is a super-2 number, since 2×990620165² = 1962656622609254450, 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 (990620161) 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, 41354 + ... + 60756.

It is an arithmetic number, because the mean of its divisors is an integer number (148615236).

Almost surely, 2^990620165 is an apocalyptic number.

It is an amenable number.

990620165 is a deficient number, since it is larger than the sum of its proper divisors (198301723).

990620165 is a wasteful number, since it uses less digits than its factorization.

990620165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29619.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 990620165 is about 31474.1189709895. The cubic root of 990620165 is about 996.8635613707.

The spelling of 990620165 in words is "nine hundred ninety million, six hundred twenty thousand, one hundred sixty-five".