1313247587 has 4 divisors (see below), whose sum is σ = 1325295840. Its totient is φ = 1301199336.

The previous prime is 1313247557. The next prime is 1313247619. The reversal of 1313247587 is 7857423131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7857423131 = 191 ⋅41138341.

It is a cyclic number.

It is not a de Polignac number, because 1313247587 - 2²⁰ = 1312199011 is a prime.

It is a super-2 number, since 2×1313247587² = 3449238449522645138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313247517) 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, 6023963 + ... + 6024180.

It is an arithmetic number, because the mean of its divisors is an integer number (331323960).

Almost surely, 2^1313247587 is an apocalyptic number.

1313247587 is a deficient number, since it is larger than the sum of its proper divisors (12048253).

1313247587 is a wasteful number, since it uses less digits than its factorization.

1313247587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12048252.

The product of its digits is 141120, while the sum is 41.

The square root of 1313247587 is about 36238.7580775059. The cubic root of 1313247587 is about 1095.0876230765.

The spelling of 1313247587 in words is "one billion, three hundred thirteen million, two hundred forty-seven thousand, five hundred eighty-seven".