13402042439 has 4 divisors (see below), whose sum is σ = 13402457880. Its totient is φ = 13401627000.

The previous prime is 13402042391. The next prime is 13402042469. The reversal of 13402042439 is 93424020431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13402042439 is a prime.

It is a super-2 number, since 2×13402042439² (a number of 21 digits) 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 (13402042469) 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, 154844 + ... + 225345.

It is an arithmetic number, because the mean of its divisors is an integer number (3350614470).

Almost surely, 2^13402042439 is an apocalyptic number.

13402042439 is a deficient number, since it is larger than the sum of its proper divisors (415441).

13402042439 is an equidigital number, since it uses as much as digits as its factorization.

13402042439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415440.

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 13402042439 in words is "thirteen billion, four hundred two million, forty-two thousand, four hundred thirty-nine".