1339397429 has 4 divisors (see below), whose sum is σ = 1339594284. Its totient is φ = 1339200576.

The previous prime is 1339397417. The next prime is 1339397443. The reversal of 1339397429 is 9247939331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9247939331 = 19 ⋅486733649.

It can be written as a sum of positive squares in 2 ways, for example, as 734139025 + 605258404 = 27095^2 + 24602^2 .

It is a cyclic number.

It is not a de Polignac number, because 1339397429 - 2²⁸ = 1070961973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1339397629) 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, 87842 + ... + 101955.

It is an arithmetic number, because the mean of its divisors is an integer number (334898571).

Almost surely, 2^1339397429 is an apocalyptic number.

It is an amenable number.

1339397429 is a deficient number, since it is larger than the sum of its proper divisors (196855).

1339397429 is an equidigital number, since it uses as much as digits as its factorization.

1339397429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196854.

The product of its digits is 1102248, while the sum is 50.

The square root of 1339397429 is about 36597.7790173120. The cubic root of 1339397429 is about 1102.3084932595.

The spelling of 1339397429 in words is "one billion, three hundred thirty-nine million, three hundred ninety-seven thousand, four hundred twenty-nine".