380642687 has 2 divisors, whose sum is σ = 380642688. Its totient is φ = 380642686.

The previous prime is 380642683. The next prime is 380642723. The reversal of 380642687 is 786246083.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 380642687 - 2² = 380642683 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (380642683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190321343 + 190321344.

It is an arithmetic number, because the mean of its divisors is an integer number (190321344).

Almost surely, 2^380642687 is an apocalyptic number.

380642687 is a deficient number, since it is larger than the sum of its proper divisors (1).

380642687 is an equidigital number, since it uses as much as digits as its factorization.

380642687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 380642687 is about 19510.0662992210. The cubic root of 380642687 is about 724.7237549228.

The spelling of 380642687 in words is "three hundred eighty million, six hundred forty-two thousand, six hundred eighty-seven".