1392422399 has 4 divisors (see below), whose sum is σ = 1392625536. Its totient is φ = 1392219264.

The previous prime is 1392422387. The next prime is 1392422407. The reversal of 1392422399 is 9932242931.

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-1392422399 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 (1392422309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90914 + ... + 105119.

It is an arithmetic number, because the mean of its divisors is an integer number (348156384).

Almost surely, 2^1392422399 is an apocalyptic number.

1392422399 is a deficient number, since it is larger than the sum of its proper divisors (203137).

1392422399 is an equidigital number, since it uses as much as digits as its factorization.

1392422399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203136.

The product of its digits is 209952, while the sum is 44.

The square root of 1392422399 is about 37315.1765237684. The cubic root of 1392422399 is about 1116.6669614415. Note that the first 3 decimals are identical.

The spelling of 1392422399 in words is "one billion, three hundred ninety-two million, four hundred twenty-two thousand, three hundred ninety-nine".