990653961 has 16 divisors (see below), whose sum is σ = 1442119680. Its totient is φ = 599909520.

The previous prime is 990653959. The next prime is 990654001. The reversal of 990653961 is 169356099.

It is not a de Polignac number, because 990653961 - 2¹ = 990653959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 990653961.

It is not an unprimeable number, because it can be changed into a prime (990653941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31480 + ... + 54518.

It is an arithmetic number, because the mean of its divisors is an integer number (90132480).

Almost surely, 2^990653961 is an apocalyptic number.

It is an amenable number.

990653961 is a deficient number, since it is larger than the sum of its proper divisors (451465719).

990653961 is a wasteful number, since it uses less digits than its factorization.

990653961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24356.

The product of its (nonzero) digits is 393660, while the sum is 48.

The square root of 990653961 is about 31474.6558519708. The cubic root of 990653961 is about 996.8748975750.

The spelling of 990653961 in words is "nine hundred ninety million, six hundred fifty-three thousand, nine hundred sixty-one".