1331312739 has 16 divisors (see below), whose sum is σ = 1814196384. Its totient is φ = 868147200.

The previous prime is 1331312737. The next prime is 1331312803. The reversal of 1331312739 is 9372131331.

1331312739 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1331312739 - 2¹ = 1331312737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1331312737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13027 + ... + 53219.

It is an arithmetic number, because the mean of its divisors is an integer number (113387274).

Almost surely, 2^1331312739 is an apocalyptic number.

1331312739 is a deficient number, since it is larger than the sum of its proper divisors (482883645).

1331312739 is a wasteful number, since it uses less digits than its factorization.

1331312739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40438.

The product of its digits is 10206, while the sum is 33.

The square root of 1331312739 is about 36487.1585492759. The cubic root of 1331312739 is about 1100.0861472476.

The spelling of 1331312739 in words is "one billion, three hundred thirty-one million, three hundred twelve thousand, seven hundred thirty-nine".