378313877 has 2 divisors, whose sum is σ = 378313878. Its totient is φ = 378313876.

The previous prime is 378313861. The next prime is 378313879. The reversal of 378313877 is 778313873.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319730161 + 58583716 = 17881^2 + 7654^2 .

It is a cyclic number.

It is not a de Polignac number, because 378313877 - 2⁴ = 378313861 is a prime.

It is a super-2 number, since 2×378313877² = 286242779061542258, which contains 22 as substring.

Together with 378313879, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378313879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189156938 + 189156939.

It is an arithmetic number, because the mean of its divisors is an integer number (189156939).

Almost surely, 2^378313877 is an apocalyptic number.

It is an amenable number.

378313877 is a deficient number, since it is larger than the sum of its proper divisors (1).

378313877 is an equidigital number, since it uses as much as digits as its factorization.

378313877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 592704, while the sum is 47.

The square root of 378313877 is about 19450.2924656675. The cubic root of 378313877 is about 723.2427530445.

The spelling of 378313877 in words is "three hundred seventy-eight million, three hundred thirteen thousand, eight hundred seventy-seven".