381699667 has 2 divisors, whose sum is σ = 381699668. Its totient is φ = 381699666.

The previous prime is 381699641. The next prime is 381699677. The reversal of 381699667 is 766996183.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 381699667 - 2²⁷ = 247481939 is a prime.

It is not a weakly prime, because it can be changed into another prime (381699677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190849833 + 190849834.

It is an arithmetic number, because the mean of its divisors is an integer number (190849834).

Almost surely, 2^381699667 is an apocalyptic number.

381699667 is a deficient number, since it is larger than the sum of its proper divisors (1).

381699667 is an equidigital number, since it uses as much as digits as its factorization.

381699667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2939328, while the sum is 55.

The square root of 381699667 is about 19537.1355884121. The cubic root of 381699667 is about 725.3939465032.

The spelling of 381699667 in words is "three hundred eighty-one million, six hundred ninety-nine thousand, six hundred sixty-seven".