990986065 has 16 divisors (see below), whose sum is σ = 1200225600. Its totient is φ = 785461312.

The previous prime is 990985987. The next prime is 990986069. The reversal of 990986065 is 560689099.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 990986065 - 2⁷ = 990985937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990986069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260346 + ... + 264124.

It is an arithmetic number, because the mean of its divisors is an integer number (75014100).

Almost surely, 2^990986065 is an apocalyptic number.

It is an amenable number.

990986065 is a deficient number, since it is larger than the sum of its proper divisors (209239535).

990986065 is a wasteful number, since it uses less digits than its factorization.

990986065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4256.

The product of its (nonzero) digits is 1049760, while the sum is 52.

The square root of 990986065 is about 31479.9311466845. The cubic root of 990986065 is about 996.9862816256.

The spelling of 990986065 in words is "nine hundred ninety million, nine hundred eighty-six thousand, sixty-five".