1399911197 has 2 divisors, whose sum is σ = 1399911198. Its totient is φ = 1399911196.

The previous prime is 1399911179. The next prime is 1399911367. The reversal of 1399911197 is 7911199931.

It is a happy number.

Together with previous prime (1399911179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 793323556 + 606587641 = 28166^2 + 24629^2 .

It is a cyclic number.

It is not a de Polignac number, because 1399911197 - 2⁶ = 1399911133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1399911137) 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, 699955598 + 699955599.

It is an arithmetic number, because the mean of its divisors is an integer number (699955599).

Almost surely, 2^1399911197 is an apocalyptic number.

It is an amenable number.

1399911197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399911197 is an equidigital number, since it uses as much as digits as its factorization.

1399911197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 137781, while the sum is 50.

The square root of 1399911197 is about 37415.3871689175. The cubic root of 1399911197 is about 1118.6652885017.

The spelling of 1399911197 in words is "one billion, three hundred ninety-nine million, nine hundred eleven thousand, one hundred ninety-seven".