1399236079 has 2 divisors, whose sum is σ = 1399236080. Its totient is φ = 1399236078.

The previous prime is 1399236077. The next prime is 1399236101. The reversal of 1399236079 is 9706329931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1399236079 - 2¹ = 1399236077 is a prime.

Together with 1399236077, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1399236077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699618039 + 699618040.

It is an arithmetic number, because the mean of its divisors is an integer number (699618040).

Almost surely, 2^1399236079 is an apocalyptic number.

1399236079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399236079 is an equidigital number, since it uses as much as digits as its factorization.

1399236079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 551124, while the sum is 49.

The square root of 1399236079 is about 37406.3641510372. The cubic root of 1399236079 is about 1118.4854312575.

The spelling of 1399236079 in words is "one billion, three hundred ninety-nine million, two hundred thirty-six thousand, seventy-nine".