990964669 has 4 divisors (see below), whose sum is σ = 991520380. Its totient is φ = 990408960.

The previous prime is 990964657. The next prime is 990964699. The reversal of 990964669 is 966469099.

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

It can be written as a sum of positive squares in 2 ways, for example, as 827252644 + 163712025 = 28762^2 + 12795^2 .

It is a cyclic number.

It is not a de Polignac number, because 990964669 - 2¹⁵ = 990931901 is a prime.

It is a super-2 number, since 2×990964669² = 1964021950412559122, 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 (990964699) 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, 275172 + ... + 278749.

It is an arithmetic number, because the mean of its divisors is an integer number (247880095).

Almost surely, 2^990964669 is an apocalyptic number.

It is an amenable number.

990964669 is a deficient number, since it is larger than the sum of its proper divisors (555711).

990964669 is a wasteful number, since it uses less digits than its factorization.

990964669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555710.

The product of its (nonzero) digits is 5668704, while the sum is 58.

The square root of 990964669 is about 31479.5913092912. The cubic root of 990964669 is about 996.9791063912.

The spelling of 990964669 in words is "nine hundred ninety million, nine hundred sixty-four thousand, six hundred sixty-nine".