381517667 has 2 divisors, whose sum is σ = 381517668. Its totient is φ = 381517666.

The previous prime is 381517639. The next prime is 381517673. The reversal of 381517667 is 766715183.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 381517667 - 2¹⁰ = 381516643 is a prime.

It is not a weakly prime, because it can be changed into another prime (381517067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190758833 + 190758834.

It is an arithmetic number, because the mean of its divisors is an integer number (190758834).

Almost surely, 2^381517667 is an apocalyptic number.

381517667 is a deficient number, since it is larger than the sum of its proper divisors (1).

381517667 is an equidigital number, since it uses as much as digits as its factorization.

381517667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 44.

The square root of 381517667 is about 19532.4772366436. The cubic root of 381517667 is about 725.2786353493.

The spelling of 381517667 in words is "three hundred eighty-one million, five hundred seventeen thousand, six hundred sixty-seven".