1394257513 has 4 divisors (see below), whose sum is σ = 1521008208. Its totient is φ = 1267506820.

The previous prime is 1394257507. The next prime is 1394257547. The reversal of 1394257513 is 3157524931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3157524931 = 11 ⋅287047721.

It is a cyclic number.

It is not a de Polignac number, because 1394257513 - 2²⁵ = 1360703081 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1394257013) 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, 63375331 + ... + 63375352.

It is an arithmetic number, because the mean of its divisors is an integer number (380252052).

Almost surely, 2^1394257513 is an apocalyptic number.

It is an amenable number.

1394257513 is a deficient number, since it is larger than the sum of its proper divisors (126750695).

1394257513 is a wasteful number, since it uses less digits than its factorization.

1394257513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126750694.

The product of its digits is 113400, while the sum is 40.

The square root of 1394257513 is about 37339.7578058562. The cubic root of 1394257513 is about 1117.1573087183.

The spelling of 1394257513 in words is "one billion, three hundred ninety-four million, two hundred fifty-seven thousand, five hundred thirteen".