1399923919 has 2 divisors, whose sum is σ = 1399923920. Its totient is φ = 1399923918.

The previous prime is 1399923901. The next prime is 1399923923. The reversal of 1399923919 is 9193299931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1399923919 - 2⁵ = 1399923887 is a prime.

It is a super-2 number, since 2×1399923919² = 3919573957976637122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1399923919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1399923319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699961959 + 699961960.

It is an arithmetic number, because the mean of its divisors is an integer number (699961960).

Almost surely, 2^1399923919 is an apocalyptic number.

1399923919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399923919 is an equidigital number, since it uses as much as digits as its factorization.

1399923919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1062882, while the sum is 55.

The square root of 1399923919 is about 37415.5571787993. The cubic root of 1399923919 is about 1118.6686771968.

The spelling of 1399923919 in words is "one billion, three hundred ninety-nine million, nine hundred twenty-three thousand, nine hundred nineteen".