1396644613 has 16 divisors (see below), whose sum is σ = 1722448000. Its totient is φ = 1102787136.

The previous prime is 1396644607. The next prime is 1396644629. The reversal of 1396644613 is 3164466931.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1396644613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1396644613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1396644653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30031 + ... + 60787.

It is an arithmetic number, because the mean of its divisors is an integer number (107653000).

Almost surely, 2^1396644613 is an apocalyptic number.

1396644613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1396644613 is a deficient number, since it is larger than the sum of its proper divisors (325803387).

1396644613 is a wasteful number, since it uses less digits than its factorization.

1396644613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31276.

The product of its digits is 279936, while the sum is 43.

The square root of 1396644613 is about 37371.7087246489. The cubic root of 1396644613 is about 1117.7945046725.

The spelling of 1396644613 in words is "one billion, three hundred ninety-six million, six hundred forty-four thousand, six hundred thirteen".