1320672413 has 4 divisors (see below), whose sum is σ = 1356366300. Its totient is φ = 1284978528.

The previous prime is 1320672407. The next prime is 1320672427. The reversal of 1320672413 is 3142760231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3142760231 = 13 ⋅241750787.

It can be written as a sum of positive squares in 2 ways, for example, as 1090452484 + 230219929 = 33022^2 + 15173^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320672413 - 2¹² = 1320668317 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 (1320672433) 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, 17846888 + ... + 17846961.

It is an arithmetic number, because the mean of its divisors is an integer number (339091575).

Almost surely, 2^1320672413 is an apocalyptic number.

It is an amenable number.

1320672413 is a deficient number, since it is larger than the sum of its proper divisors (35693887).

1320672413 is an equidigital number, since it uses as much as digits as its factorization.

1320672413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35693886.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 1320672413 is about 36341.0568503449. The cubic root of 1320672413 is about 1097.1475442829.

The spelling of 1320672413 in words is "one billion, three hundred twenty million, six hundred seventy-two thousand, four hundred thirteen".