1399269673 has 2 divisors, whose sum is σ = 1399269674. Its totient is φ = 1399269672.

The previous prime is 1399269637. The next prime is 1399269679. The reversal of 1399269673 is 3769629931.

Together with previous prime (1399269637) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1321177104 + 78092569 = 36348^2 + 8837^2 .

It is a cyclic number.

It is not a de Polignac number, because 1399269673 - 2²¹ = 1397172521 is a prime.

It is not a weakly prime, because it can be changed into another prime (1399269679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699634836 + 699634837.

It is an arithmetic number, because the mean of its divisors is an integer number (699634837).

Almost surely, 2^1399269673 is an apocalyptic number.

It is an amenable number.

1399269673 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399269673 is an equidigital number, since it uses as much as digits as its factorization.

1399269673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3306744, while the sum is 55.

The square root of 1399269673 is about 37406.8131895782. The cubic root of 1399269673 is about 1118.4943823558.

The spelling of 1399269673 in words is "one billion, three hundred ninety-nine million, two hundred sixty-nine thousand, six hundred seventy-three".