378458117 has 2 divisors, whose sum is σ = 378458118. Its totient is φ = 378458116.

The previous prime is 378458099. The next prime is 378458141. The reversal of 378458117 is 711854873.

It is a Cunningham number, because it is equal to 19454²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 378458116 + 1 = 19454^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 378458117 - 2⁸ = 378457861 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378458317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189229058 + 189229059.

It is an arithmetic number, because the mean of its divisors is an integer number (189229059).

Almost surely, 2^378458117 is an apocalyptic number.

It is an amenable number.

378458117 is a deficient number, since it is larger than the sum of its proper divisors (1).

378458117 is an equidigital number, since it uses as much as digits as its factorization.

378458117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 44.

The square root of 378458117 is about 19454.0000257017. Note that the first 4 decimals coincide. The cubic root of 378458117 is about 723.3346584576.

The spelling of 378458117 in words is "three hundred seventy-eight million, four hundred fifty-eight thousand, one hundred seventeen".