1387512513 has 24 divisors (see below), whose sum is σ = 2095441920. Its totient is φ = 884720760.

The previous prime is 1387512509. The next prime is 1387512517. The reversal of 1387512513 is 3152157831.

It is a happy number.

1387512513 is a `hidden beast` number, since 13 + 87 + 51 + 2 + 513 = 666.

It is an interprime number because it is at equal distance from previous prime (1387512509) and next prime (1387512517).

It is not a de Polignac number, because 1387512513 - 2² = 1387512509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1387512517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103168 + ... + 115838.

It is an arithmetic number, because the mean of its divisors is an integer number (87310080).

Almost surely, 2^1387512513 is an apocalyptic number.

It is an amenable number.

1387512513 is a deficient number, since it is larger than the sum of its proper divisors (707929407).

1387512513 is an equidigital number, since it uses as much as digits as its factorization.

1387512513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12746 (or 12697 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 1387512513 is about 37249.3290275140. The cubic root of 1387512513 is about 1115.3529051092.

The spelling of 1387512513 in words is "one billion, three hundred eighty-seven million, five hundred twelve thousand, five hundred thirteen".