1396722529 has 4 divisors (see below), whose sum is σ = 1399169200. Its totient is φ = 1394275860.

The previous prime is 1396722527. The next prime is 1396722553. The reversal of 1396722529 is 9252276931.

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 1396722529 - 2¹ = 1396722527 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1396722521) 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, 1222479 + ... + 1223620.

It is an arithmetic number, because the mean of its divisors is an integer number (349792300).

Almost surely, 2^1396722529 is an apocalyptic number.

It is an amenable number.

1396722529 is a deficient number, since it is larger than the sum of its proper divisors (2446671).

1396722529 is an equidigital number, since it uses as much as digits as its factorization.

1396722529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2446670.

The product of its digits is 408240, while the sum is 46.

The square root of 1396722529 is about 37372.7511564241. The cubic root of 1396722529 is about 1117.8152907900.

The spelling of 1396722529 in words is "one billion, three hundred ninety-six million, seven hundred twenty-two thousand, five hundred twenty-nine".