1372279454209 has 2 divisors, whose sum is σ = 1372279454210. Its totient is φ = 1372279454208.

The previous prime is 1372279454159. The next prime is 1372279454219. The reversal of 1372279454209 is 9024549722731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1306284413184 + 65995041025 = 1142928^2 + 256895^2 .

It is a cyclic number.

It is not a de Polignac number, because 1372279454209 - 2⁷ = 1372279454081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1372279454209.

It is not a weakly prime, because it can be changed into another prime (1372279454219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 686139727104 + 686139727105.

It is an arithmetic number, because the mean of its divisors is an integer number (686139727105).

Almost surely, 2^{1372279454209} is an apocalyptic number.

It is an amenable number.

1372279454209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1372279454209 is an equidigital number, since it uses as much as digits as its factorization.

1372279454209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7620480, while the sum is 55.

The spelling of 1372279454209 in words is "one trillion, three hundred seventy-two billion, two hundred seventy-nine million, four hundred fifty-four thousand, two hundred nine".