378675637 has 2 divisors, whose sum is σ = 378675638. Its totient is φ = 378675636.

The previous prime is 378675623. The next prime is 378675659. The reversal of 378675637 is 736576873.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 353665636 + 25010001 = 18806^2 + 5001^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378675637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378673637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189337818 + 189337819.

It is an arithmetic number, because the mean of its divisors is an integer number (189337819).

Almost surely, 2^378675637 is an apocalyptic number.

It is an amenable number.

378675637 is a deficient number, since it is larger than the sum of its proper divisors (1).

378675637 is an equidigital number, since it uses as much as digits as its factorization.

378675637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4445280, while the sum is 52.

The square root of 378675637 is about 19459.5898466540. The cubic root of 378675637 is about 723.4732115441.

The spelling of 378675637 in words is "three hundred seventy-eight million, six hundred seventy-five thousand, six hundred thirty-seven".