1389157513 has 4 divisors (see below), whose sum is σ = 1389251968. Its totient is φ = 1389063060.

The previous prime is 1389157487. The next prime is 1389157541. The reversal of 1389157513 is 3157519831.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3157519831 = 47 ⋅67181273.

It is a cyclic number.

It is not a de Polignac number, because 1389157513 - 2²¹ = 1387060361 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1389157513.

It is not an unprimeable number, because it can be changed into a prime (1389157573) 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, 19893 + ... + 56338.

It is an arithmetic number, because the mean of its divisors is an integer number (347312992).

Almost surely, 2^1389157513 is an apocalyptic number.

It is an amenable number.

1389157513 is a deficient number, since it is larger than the sum of its proper divisors (94455).

1389157513 is an equidigital number, since it uses as much as digits as its factorization.

1389157513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94454.

The product of its digits is 113400, while the sum is 43.

The square root of 1389157513 is about 37271.4034213900. The cubic root of 1389157513 is about 1115.7935091659.

The spelling of 1389157513 in words is "one billion, three hundred eighty-nine million, one hundred fifty-seven thousand, five hundred thirteen".