378170887 has 2 divisors, whose sum is σ = 378170888. Its totient is φ = 378170886.

The previous prime is 378170861. The next prime is 378170909. The reversal of 378170887 is 788071873.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378170887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 378170887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378170087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189085443 + 189085444.

It is an arithmetic number, because the mean of its divisors is an integer number (189085444).

Almost surely, 2^378170887 is an apocalyptic number.

378170887 is a deficient number, since it is larger than the sum of its proper divisors (1).

378170887 is an equidigital number, since it uses as much as digits as its factorization.

378170887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 526848, while the sum is 49.

The square root of 378170887 is about 19446.6163380677. The cubic root of 378170887 is about 723.1516210334.

The spelling of 378170887 in words is "three hundred seventy-eight million, one hundred seventy thousand, eight hundred eighty-seven".