372878861 has 2 divisors, whose sum is σ = 372878862. Its totient is φ = 372878860.

The previous prime is 372878827. The next prime is 372878873. The reversal of 372878861 is 168878273.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 304502500 + 68376361 = 17450^2 + 8269^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-372878861 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (372871861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186439430 + 186439431.

It is an arithmetic number, because the mean of its divisors is an integer number (186439431).

Almost surely, 2^372878861 is an apocalyptic number.

It is an amenable number.

372878861 is a deficient number, since it is larger than the sum of its proper divisors (1).

372878861 is an equidigital number, since it uses as much as digits as its factorization.

372878861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 903168, while the sum is 50.

The square root of 372878861 is about 19310.0714913229. The cubic root of 372878861 is about 719.7625638126.

The spelling of 372878861 in words is "three hundred seventy-two million, eight hundred seventy-eight thousand, eight hundred sixty-one".