1372854661 has 2 divisors, whose sum is σ = 1372854662. Its totient is φ = 1372854660.

The previous prime is 1372854649. The next prime is 1372854667. The reversal of 1372854661 is 1664582731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1018248100 + 354606561 = 31910^2 + 18831^2 .

It is a cyclic number.

It is not a de Polignac number, because 1372854661 - 2²⁵ = 1339300229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1372854667) 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, 686427330 + 686427331.

It is an arithmetic number, because the mean of its divisors is an integer number (686427331).

Almost surely, 2^1372854661 is an apocalyptic number.

It is an amenable number.

1372854661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1372854661 is an equidigital number, since it uses as much as digits as its factorization.

1372854661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 43.

The square root of 1372854661 is about 37052.0533978888. The cubic root of 1372854661 is about 1111.4114180376.

The spelling of 1372854661 in words is "one billion, three hundred seventy-two million, eight hundred fifty-four thousand, six hundred sixty-one".