378513977 has 2 divisors, whose sum is σ = 378513978. Its totient is φ = 378513976.

The previous prime is 378513973. The next prime is 378513997. The reversal of 378513977 is 779315873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314849536 + 63664441 = 17744^2 + 7979^2 .

It is a cyclic number.

It is not a de Polignac number, because 378513977 - 2² = 378513973 is a prime.

It is not a weakly prime, because it can be changed into another prime (378513973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189256988 + 189256989.

It is an arithmetic number, because the mean of its divisors is an integer number (189256989).

Almost surely, 2^378513977 is an apocalyptic number.

It is an amenable number.

378513977 is a deficient number, since it is larger than the sum of its proper divisors (1).

378513977 is an equidigital number, since it uses as much as digits as its factorization.

378513977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1111320, while the sum is 50.

The square root of 378513977 is about 19455.4356671857. The cubic root of 378513977 is about 723.3702445056.

The spelling of 378513977 in words is "three hundred seventy-eight million, five hundred thirteen thousand, nine hundred seventy-seven".