378758161 has 2 divisors, whose sum is σ = 378758162. Its totient is φ = 378758160.

The previous prime is 378758129. The next prime is 378758167. The reversal of 378758161 is 161857873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 377913600 + 844561 = 19440^2 + 919^2 .

It is a cyclic number.

It is not a de Polignac number, because 378758161 - 2⁵ = 378758129 is a prime.

It is not a weakly prime, because it can be changed into another prime (378758167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189379080 + 189379081.

It is an arithmetic number, because the mean of its divisors is an integer number (189379081).

Almost surely, 2^378758161 is an apocalyptic number.

It is an amenable number.

378758161 is a deficient number, since it is larger than the sum of its proper divisors (1).

378758161 is an equidigital number, since it uses as much as digits as its factorization.

378758161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 46.

The square root of 378758161 is about 19461.7101252691. The cubic root of 378758161 is about 723.5257627347.

The spelling of 378758161 in words is "three hundred seventy-eight million, seven hundred fifty-eight thousand, one hundred sixty-one".