1396655571 has 4 divisors (see below), whose sum is σ = 1862207432. Its totient is φ = 931103712.

The previous prime is 1396655543. The next prime is 1396655593. The reversal of 1396655571 is 1755566931.

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

It is not a de Polignac number, because 1396655571 - 2¹⁷ = 1396524499 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 1396655571.

It is not an unprimeable number, because it can be changed into a prime (1396655171) 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, 232775926 + ... + 232775931.

It is an arithmetic number, because the mean of its divisors is an integer number (465551858).

Almost surely, 2^1396655571 is an apocalyptic number.

1396655571 is a deficient number, since it is larger than the sum of its proper divisors (465551861).

1396655571 is an equidigital number, since it uses as much as digits as its factorization.

1396655571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465551860.

The product of its digits is 850500, while the sum is 48.

The square root of 1396655571 is about 37371.8553325895. The cubic root of 1396655571 is about 1117.7974280505.

The spelling of 1396655571 in words is "one billion, three hundred ninety-six million, six hundred fifty-five thousand, five hundred seventy-one".