1303999664 has 40 divisors (see below), whose sum is σ = 2758283280. Its totient is φ = 592275200.

The previous prime is 1303999663. The next prime is 1303999681. The reversal of 1303999664 is 4669993031.

It is a super-2 number, since 2×1303999664² = 3400830247424225792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1303999663) 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, 362354 + ... + 365934.

It is an arithmetic number, because the mean of its divisors is an integer number (68957082).

Almost surely, 2^1303999664 is an apocalyptic number.

It is an amenable number.

1303999664 is an abundant number, since it is smaller than the sum of its proper divisors (1454283616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1303999664 is a wasteful number, since it uses less digits than its factorization.

1303999664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5669 (or 5663 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 50.

The square root of 1303999664 is about 36110.9355182056. The cubic root of 1303999664 is about 1092.5110204210.

The spelling of 1303999664 in words is "one billion, three hundred three million, nine hundred ninety-nine thousand, six hundred sixty-four".