378121873 has 2 divisors, whose sum is σ = 378121874. Its totient is φ = 378121872.

The previous prime is 378121853. The next prime is 378121883.

378121873 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265592209 + 112529664 = 16297^2 + 10608^2 .

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378121873 is a prime.

It is not a weakly prime, because it can be changed into another prime (378121813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189060936 + 189060937.

It is an arithmetic number, because the mean of its divisors is an integer number (189060937).

Almost surely, 2^378121873 is an apocalyptic number.

It is an amenable number.

378121873 is a deficient number, since it is larger than the sum of its proper divisors (1).

378121873 is an equidigital number, since it uses as much as digits as its factorization.

378121873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 40.

The square root of 378121873 is about 19445.3560779946. The cubic root of 378121873 is about 723.1203775875.

The spelling of 378121873 in words is "three hundred seventy-eight million, one hundred twenty-one thousand, eight hundred seventy-three".