1396557311 has 4 divisors (see below), whose sum is σ = 1429035432. Its totient is φ = 1364079192.

The previous prime is 1396557307. The next prime is 1396557329. The reversal of 1396557311 is 1137556931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1396557311 - 2² = 1396557307 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 (1396557391) 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, 16238996 + ... + 16239081.

It is an arithmetic number, because the mean of its divisors is an integer number (357258858).

Almost surely, 2^1396557311 is an apocalyptic number.

1396557311 is a deficient number, since it is larger than the sum of its proper divisors (32478121).

1396557311 is an equidigital number, since it uses as much as digits as its factorization.

1396557311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32478120.

The product of its digits is 85050, while the sum is 41.

The square root of 1396557311 is about 37370.5406838060. The cubic root of 1396557311 is about 1117.7712136772.

The spelling of 1396557311 in words is "one billion, three hundred ninety-six million, five hundred fifty-seven thousand, three hundred eleven".