1330139977 has 4 divisors (see below), whose sum is σ = 1345085460. Its totient is φ = 1315194496.

The previous prime is 1330139963. The next prime is 1330139983. The reversal of 1330139977 is 7799310331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7799310331 = 47 ⋅165942773.

It can be written as a sum of positive squares in 2 ways, for example, as 672935481 + 657204496 = 25941^2 + 25636^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330139977 - 2⁷ = 1330139849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1330139947) 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, 7472608 + ... + 7472785.

It is an arithmetic number, because the mean of its divisors is an integer number (336271365).

Almost surely, 2^1330139977 is an apocalyptic number.

It is an amenable number.

1330139977 is a deficient number, since it is larger than the sum of its proper divisors (14945483).

1330139977 is an equidigital number, since it uses as much as digits as its factorization.

1330139977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14945482.

The product of its (nonzero) digits is 107163, while the sum is 43.

The square root of 1330139977 is about 36471.0841215339. The cubic root of 1330139977 is about 1099.7630280164.

The spelling of 1330139977 in words is "one billion, three hundred thirty million, one hundred thirty-nine thousand, nine hundred seventy-seven".