1396993637 has 8 divisors (see below), whose sum is σ = 1512252504. Its totient is φ = 1282848768.

The previous prime is 1396993613. The next prime is 1396993679. The reversal of 1396993637 is 7363996931.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18653761 + 1378339876 = 4319^2 + 37126^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1396993637 - 2¹² = 1396989541 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 (1396993337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275888 + ... + 280905.

It is an arithmetic number, because the mean of its divisors is an integer number (189031563).

Almost surely, 2^1396993637 is an apocalyptic number.

It is an amenable number.

1396993637 is a deficient number, since it is larger than the sum of its proper divisors (115258867).

1396993637 is a wasteful number, since it uses less digits than its factorization.

1396993637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556999.

The product of its digits is 4960116, while the sum is 56.

The square root of 1396993637 is about 37376.3780615511. The cubic root of 1396993637 is about 1117.8876098694.

The spelling of 1396993637 in words is "one billion, three hundred ninety-six million, nine hundred ninety-three thousand, six hundred thirty-seven".