1399413729 has 8 divisors (see below), whose sum is σ = 2132440000. Its totient is φ = 799664976.

The previous prime is 1399413727. The next prime is 1399413737. The reversal of 1399413729 is 9273149931.

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

It is not a de Polignac number, because 1399413729 - 2¹ = 1399413727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1399413727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33319354 + ... + 33319395.

It is an arithmetic number, because the mean of its divisors is an integer number (266555000).

Almost surely, 2^1399413729 is an apocalyptic number.

It is an amenable number.

1399413729 is a deficient number, since it is larger than the sum of its proper divisors (733026271).

1399413729 is an equidigital number, since it uses as much as digits as its factorization.

1399413729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66638759.

The product of its digits is 367416, while the sum is 48.

The square root of 1399413729 is about 37408.7386715992. The cubic root of 1399413729 is about 1118.5327643538.

The spelling of 1399413729 in words is "one billion, three hundred ninety-nine million, four hundred thirteen thousand, seven hundred twenty-nine".