381318677 has 2 divisors, whose sum is σ = 381318678. Its totient is φ = 381318676.

The previous prime is 381318667. The next prime is 381318739. The reversal of 381318677 is 776813183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 269255281 + 112063396 = 16409^2 + 10586^2 .

It is a cyclic number.

It is not a de Polignac number, because 381318677 - 2¹⁶ = 381253141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381318667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190659338 + 190659339.

It is an arithmetic number, because the mean of its divisors is an integer number (190659339).

Almost surely, 2^381318677 is an apocalyptic number.

It is an amenable number.

381318677 is a deficient number, since it is larger than the sum of its proper divisors (1).

381318677 is an equidigital number, since it uses as much as digits as its factorization.

381318677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 44.

The square root of 381318677 is about 19527.3827483357. The cubic root of 381318677 is about 725.1525177343.

The spelling of 381318677 in words is "three hundred eighty-one million, three hundred eighteen thousand, six hundred seventy-seven".