1972399413 has 4 divisors (see below), whose sum is σ = 2629865888. Its totient is φ = 1314932940.

The previous prime is 1972399411. The next prime is 1972399447. The reversal of 1972399413 is 3149932791.

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.

It is not a de Polignac number, because 1972399413 - 2¹ = 1972399411 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 (1972399411) 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, 328733233 + ... + 328733238.

It is an arithmetic number, because the mean of its divisors is an integer number (657466472).

Almost surely, 2^1972399413 is an apocalyptic number.

It is an amenable number.

1972399413 is a deficient number, since it is larger than the sum of its proper divisors (657466475).

1972399413 is an equidigital number, since it uses as much as digits as its factorization.

1972399413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657466474.

The product of its digits is 367416, while the sum is 48.

The square root of 1972399413 is about 44411.7035588593. The cubic root of 1972399413 is about 1254.0984224340.

The spelling of 1972399413 in words is "one billion, nine hundred seventy-two million, three hundred ninety-nine thousand, four hundred thirteen".