1313015873 has 8 divisors (see below), whose sum is σ = 1414916328. Its totient is φ = 1211243904.

The previous prime is 1313015839. The next prime is 1313015903. The reversal of 1313015873 is 3785103131.

It can be written as a sum of positive squares in 4 ways, for example, as 4963984 + 1308051889 = 2228^2 + 36167^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1313015873 - 2⁸ = 1313015617 is a prime.

It is a Duffinian number.

1313015873 is a modest number, since divided by 15873 gives 1313 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1313015773) 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, 10340 + ... + 52277.

It is an arithmetic number, because the mean of its divisors is an integer number (176864541).

Almost surely, 2^1313015873 is an apocalyptic number.

1313015873 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1313015873 is a deficient number, since it is larger than the sum of its proper divisors (101900455).

1313015873 is a wasteful number, since it uses less digits than its factorization.

1313015873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64243.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 1313015873 is about 36235.5608898220. The cubic root of 1313015873 is about 1095.0232122572.

The spelling of 1313015873 in words is "one billion, three hundred thirteen million, fifteen thousand, eight hundred seventy-three".