381962689 has 2 divisors, whose sum is σ = 381962690. Its totient is φ = 381962688.

The previous prime is 381962677. The next prime is 381962699. The reversal of 381962689 is 986269183.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376360000 + 5602689 = 19400^2 + 2367^2 .

It is a cyclic number.

It is not a de Polignac number, because 381962689 - 2⁵ = 381962657 is a prime.

It is a super-2 number, since 2×381962689² = 291790991576221442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (381962639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190981344 + 190981345.

It is an arithmetic number, because the mean of its divisors is an integer number (190981345).

Almost surely, 2^381962689 is an apocalyptic number.

It is an amenable number.

381962689 is a deficient number, since it is larger than the sum of its proper divisors (1).

381962689 is an equidigital number, since it uses as much as digits as its factorization.

381962689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 52.

The square root of 381962689 is about 19543.8657639680. The cubic root of 381962689 is about 725.5605266495.

The spelling of 381962689 in words is "three hundred eighty-one million, nine hundred sixty-two thousand, six hundred eighty-nine".