378667477 has 2 divisors, whose sum is σ = 378667478. Its totient is φ = 378667476.

The previous prime is 378667463. The next prime is 378667493. The reversal of 378667477 is 774766873.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 357928561 + 20738916 = 18919^2 + 4554^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378667477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378667427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189333738 + 189333739.

It is an arithmetic number, because the mean of its divisors is an integer number (189333739).

Almost surely, 2^378667477 is an apocalyptic number.

It is an amenable number.

378667477 is a deficient number, since it is larger than the sum of its proper divisors (1).

378667477 is an equidigital number, since it uses as much as digits as its factorization.

378667477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8297856, while the sum is 55.

The square root of 378667477 is about 19459.3801802627. The cubic root of 378667477 is about 723.4680148504.

The spelling of 378667477 in words is "three hundred seventy-eight million, six hundred sixty-seven thousand, four hundred seventy-seven".