1396722291 has 8 divisors (see below), whose sum is σ = 1885870080. Its totient is φ = 919361352.

The previous prime is 1396722289. The next prime is 1396722323. The reversal of 1396722291 is 1922276931.

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

It is not a de Polignac number, because 1396722291 - 2¹ = 1396722289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1396722211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2946435 + ... + 2946908.

It is an arithmetic number, because the mean of its divisors is an integer number (235733760).

Almost surely, 2^1396722291 is an apocalyptic number.

1396722291 is a deficient number, since it is larger than the sum of its proper divisors (489147789).

1396722291 is an equidigital number, since it uses as much as digits as its factorization.

1396722291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5893425.

The product of its digits is 81648, while the sum is 42.

The square root of 1396722291 is about 37372.7479722859. The cubic root of 1396722291 is about 1117.8152272985.

The spelling of 1396722291 in words is "one billion, three hundred ninety-six million, seven hundred twenty-two thousand, two hundred ninety-one".