1370906909 has 2 divisors, whose sum is σ = 1370906910. Its totient is φ = 1370906908.

The previous prime is 1370906839. The next prime is 1370906963. The reversal of 1370906909 is 9096090731.

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., 1310222809 + 60684100 = 36197^2 + 7790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1370906909 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1370906909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1370906989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 685453454 + 685453455.

It is an arithmetic number, because the mean of its divisors is an integer number (685453455).

Almost surely, 2^1370906909 is an apocalyptic number.

It is an amenable number.

1370906909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1370906909 is an equidigital number, since it uses as much as digits as its factorization.

1370906909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 1370906909 is about 37025.7600732247. The cubic root of 1370906909 is about 1110.8855603880.

The spelling of 1370906909 in words is "one billion, three hundred seventy million, nine hundred six thousand, nine hundred nine".