1399417079 has 2 divisors, whose sum is σ = 1399417080. Its totient is φ = 1399417078.

The previous prime is 1399417073. The next prime is 1399417093. The reversal of 1399417079 is 9707149931.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1399417079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1399417073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699708539 + 699708540.

It is an arithmetic number, because the mean of its divisors is an integer number (699708540).

Almost surely, 2^1399417079 is an apocalyptic number.

1399417079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399417079 is an equidigital number, since it uses as much as digits as its factorization.

1399417079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 428652, while the sum is 50.

The square root of 1399417079 is about 37408.7834472066. The cubic root of 1399417079 is about 1118.5336568899.

The spelling of 1399417079 in words is "one billion, three hundred ninety-nine million, four hundred seventeen thousand, seventy-nine".