1396329771 has 4 divisors (see below), whose sum is σ = 1861773032. Its totient is φ = 930886512.

The previous prime is 1396329751. The next prime is 1396329797. The reversal of 1396329771 is 1779236931.

It is a happy number.

1396329771 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-1396329771 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 1396329771.

It is not an unprimeable number, because it can be changed into a prime (1396329751) 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, 232721626 + ... + 232721631.

It is an arithmetic number, because the mean of its divisors is an integer number (465443258).

Almost surely, 2^1396329771 is an apocalyptic number.

1396329771 is a deficient number, since it is larger than the sum of its proper divisors (465443261).

1396329771 is an equidigital number, since it uses as much as digits as its factorization.

1396329771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465443260.

The product of its digits is 428652, while the sum is 48.

The square root of 1396329771 is about 37367.4961831804. The cubic root of 1396329771 is about 1117.7105045143.

It can be divided in two parts, 13963 and 29771, that added together give a palindrome (43734).

The spelling of 1396329771 in words is "one billion, three hundred ninety-six million, three hundred twenty-nine thousand, seven hundred seventy-one".