1396899557 has 4 divisors (see below), whose sum is σ = 1399816320. Its totient is φ = 1393982796.

The previous prime is 1396899523. The next prime is 1396899563. The reversal of 1396899557 is 7559986931.

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 a cyclic number.

It is not a de Polignac number, because 1396899557 - 2¹⁸ = 1396637413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1396899557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1396899577) 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, 1457663 + ... + 1458620.

It is an arithmetic number, because the mean of its divisors is an integer number (349954080).

Almost surely, 2^1396899557 is an apocalyptic number.

It is an amenable number.

1396899557 is a deficient number, since it is larger than the sum of its proper divisors (2916763).

1396899557 is an equidigital number, since it uses as much as digits as its factorization.

1396899557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2916762.

The product of its digits is 18370800, while the sum is 62.

The square root of 1396899557 is about 37375.1194914478. The cubic root of 1396899557 is about 1117.8625147355.

The spelling of 1396899557 in words is "one billion, three hundred ninety-six million, eight hundred ninety-nine thousand, five hundred fifty-seven".