1396412909 has 2 divisors, whose sum is σ = 1396412910. Its totient is φ = 1396412908.

The previous prime is 1396412863. The next prime is 1396412933. The reversal of 1396412909 is 9092146931.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1038257284 + 358155625 = 32222^2 + 18925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1396412909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1396412909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1396412609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698206454 + 698206455.

It is an arithmetic number, because the mean of its divisors is an integer number (698206455).

Almost surely, 2^1396412909 is an apocalyptic number.

It is an amenable number.

1396412909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1396412909 is an equidigital number, since it uses as much as digits as its factorization.

1396412909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 1396412909 is about 37368.6086040141. The cubic root of 1396412909 is about 1117.7326870420.

The spelling of 1396412909 in words is "one billion, three hundred ninety-six million, four hundred twelve thousand, nine hundred nine".