378377639 has 2 divisors, whose sum is σ = 378377640. Its totient is φ = 378377638.

The previous prime is 378377633. The next prime is 378377677. The reversal of 378377639 is 936773873.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 378377639 - 2⁸ = 378377383 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (378377633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189188819 + 189188820.

It is an arithmetic number, because the mean of its divisors is an integer number (189188820).

Almost surely, 2^378377639 is an apocalyptic number.

378377639 is a deficient number, since it is larger than the sum of its proper divisors (1).

378377639 is an equidigital number, since it uses as much as digits as its factorization.

378377639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4000752, while the sum is 53.

The square root of 378377639 is about 19451.9314979259. The cubic root of 378377639 is about 723.2833831638.

The spelling of 378377639 in words is "three hundred seventy-eight million, three hundred seventy-seven thousand, six hundred thirty-nine".