990655967 has 4 divisors (see below), whose sum is σ = 1132178256. Its totient is φ = 849133680.

The previous prime is 990655951. The next prime is 990655987. The reversal of 990655967 is 769556099.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 990655967 - 2⁴ = 990655951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990655907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70761134 + ... + 70761147.

It is an arithmetic number, because the mean of its divisors is an integer number (283044564).

Almost surely, 2^990655967 is an apocalyptic number.

990655967 is a deficient number, since it is larger than the sum of its proper divisors (141522289).

990655967 is a wasteful number, since it uses less digits than its factorization.

990655967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141522288.

The product of its (nonzero) digits is 4592700, while the sum is 56.

The square root of 990655967 is about 31474.6877188639. The cubic root of 990655967 is about 996.8755704402.

The spelling of 990655967 in words is "nine hundred ninety million, six hundred fifty-five thousand, nine hundred sixty-seven".