1399931269 has 8 divisors (see below), whose sum is σ = 1528811712. Its totient is φ = 1271319840.

The previous prime is 1399931261. The next prime is 1399931303. The reversal of 1399931269 is 9621399931.

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

It is a cyclic number.

It is not a de Polignac number, because 1399931269 - 2³ = 1399931261 is a prime.

It is a super-2 number, since 2×1399931269² = 3919615115847900722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399931261) 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, 56289 + ... + 77254.

It is an arithmetic number, because the mean of its divisors is an integer number (191101464).

Almost surely, 2^1399931269 is an apocalyptic number.

It is an amenable number.

1399931269 is a deficient number, since it is larger than the sum of its proper divisors (128880443).

1399931269 is a wasteful number, since it uses less digits than its factorization.

1399931269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134507.

The product of its digits is 708588, while the sum is 52.

The square root of 1399931269 is about 37415.6553998457. The cubic root of 1399931269 is about 1118.6706349700.

The spelling of 1399931269 in words is "one billion, three hundred ninety-nine million, nine hundred thirty-one thousand, two hundred sixty-nine".