381695969 has 2 divisors, whose sum is σ = 381695970. Its totient is φ = 381695968.

The previous prime is 381695953. The next prime is 381696031. The reversal of 381695969 is 969596183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 381694369 + 1600 = 19537^2 + 40^2 .

It is a cyclic number.

It is not a de Polignac number, because 381695969 - 2⁴ = 381695953 is a prime.

It is a super-2 number, since 2×381695969² = 291383625501697922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (381095969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190847984 + 190847985.

It is an arithmetic number, because the mean of its divisors is an integer number (190847985).

Almost surely, 2^381695969 is an apocalyptic number.

It is an amenable number.

381695969 is a deficient number, since it is larger than the sum of its proper divisors (1).

381695969 is an equidigital number, since it uses as much as digits as its factorization.

381695969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3149280, while the sum is 56.

The square root of 381695969 is about 19537.0409479020. The cubic root of 381695969 is about 725.3916038975.

The spelling of 381695969 in words is "three hundred eighty-one million, six hundred ninety-five thousand, nine hundred sixty-nine".