1390506679 has 2 divisors, whose sum is σ = 1390506680. Its totient is φ = 1390506678.

The previous prime is 1390506673. The next prime is 1390506727. The reversal of 1390506679 is 9766050931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1390506679 - 2⁵ = 1390506647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1390506673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695253339 + 695253340.

It is an arithmetic number, because the mean of its divisors is an integer number (695253340).

Almost surely, 2^1390506679 is an apocalyptic number.

1390506679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1390506679 is an equidigital number, since it uses as much as digits as its factorization.

1390506679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 46.

The square root of 1390506679 is about 37289.4982401212. The cubic root of 1390506679 is about 1116.1546161830.

The spelling of 1390506679 in words is "one billion, three hundred ninety million, five hundred six thousand, six hundred seventy-nine".