1396976909 has 2 divisors, whose sum is σ = 1396976910. Its totient is φ = 1396976908.

The previous prime is 1396976891. The next prime is 1396976927. The reversal of 1396976909 is 9096796931.

It is a balanced prime because it is at equal distance from previous prime (1396976891) and next prime (1396976927).

It can be written as a sum of positive squares in only one way, i.e., 1155796009 + 241180900 = 33997^2 + 15530^2 .

It is a cyclic number.

It is not a de Polignac number, because 1396976909 - 2²⁰ = 1395928333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1396976929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698488454 + 698488455.

It is an arithmetic number, because the mean of its divisors is an integer number (698488455).

Almost surely, 2^1396976909 is an apocalyptic number.

It is an amenable number.

1396976909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1396976909 is an equidigital number, since it uses as much as digits as its factorization.

1396976909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4960116, while the sum is 59.

The square root of 1396976909 is about 37376.1542831790. The cubic root of 1396976909 is about 1117.8831478833.

The spelling of 1396976909 in words is "one billion, three hundred ninety-six million, nine hundred seventy-six thousand, nine hundred nine".