1308713731 has 24 divisors (see below), whose sum is σ = 1505044800. Its totient is φ = 1130654976.

The previous prime is 1308713719. The next prime is 1308713743. The reversal of 1308713731 is 1373178031.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1308713719) and next prime (1308713743).

It is not a de Polignac number, because 1308713731 - 2⁷ = 1308713603 is a prime.

It is a super-2 number, since 2×1308713731² = 3425463259415880722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1318713731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 321195 + ... + 325243.

It is an arithmetic number, because the mean of its divisors is an integer number (62710200).

Almost surely, 2^1308713731 is an apocalyptic number.

1308713731 is a deficient number, since it is larger than the sum of its proper divisors (196331069).

1308713731 is a wasteful number, since it uses less digits than its factorization.

1308713731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4155 (or 4132 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 1308713731 is about 36176.1486479697. The cubic root of 1308713731 is about 1093.8259431742.

The spelling of 1308713731 in words is "one billion, three hundred eight million, seven hundred thirteen thousand, seven hundred thirty-one".