1372690409 has 2 divisors, whose sum is σ = 1372690410. Its totient is φ = 1372690408.

The previous prime is 1372690399. The next prime is 1372690441. The reversal of 1372690409 is 9040962731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 933913600 + 438776809 = 30560^2 + 20947^2 .

It is a cyclic number.

It is not a de Polignac number, because 1372690409 - 2⁸ = 1372690153 is a prime.

It is not a weakly prime, because it can be changed into another prime (1372693409) 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, 686345204 + 686345205.

It is an arithmetic number, because the mean of its divisors is an integer number (686345205).

Almost surely, 2^1372690409 is an apocalyptic number.

It is an amenable number.

1372690409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1372690409 is an equidigital number, since it uses as much as digits as its factorization.

1372690409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 1372690409 is about 37049.8368282507. The cubic root of 1372690409 is about 1111.3670921925.

The spelling of 1372690409 in words is "one billion, three hundred seventy-two million, six hundred ninety thousand, four hundred nine".