1397152013 has 4 divisors (see below), whose sum is σ = 1411555740. Its totient is φ = 1382748288.

The previous prime is 1397151983. The next prime is 1397152067. The reversal of 1397152013 is 3102517931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1044388489 + 352763524 = 32317^2 + 18782^2 .

It is a cyclic number.

It is not a de Polignac number, because 1397152013 - 2³⁰ = 323410189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397158013) 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, 7201718 + ... + 7201911.

It is an arithmetic number, because the mean of its divisors is an integer number (352888935).

Almost surely, 2^1397152013 is an apocalyptic number.

It is an amenable number.

1397152013 is a deficient number, since it is larger than the sum of its proper divisors (14403727).

1397152013 is an equidigital number, since it uses as much as digits as its factorization.

1397152013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14403726.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 1397152013 is about 37378.4966658639. The cubic root of 1397152013 is about 1117.9298529342.

Adding to 1397152013 its reverse (3102517931), we get a palindrome (4499669944).

The spelling of 1397152013 in words is "one billion, three hundred ninety-seven million, one hundred fifty-two thousand, thirteen".