381335287 has 2 divisors, whose sum is σ = 381335288. Its totient is φ = 381335286.

The previous prime is 381335233. The next prime is 381335293. The reversal of 381335287 is 782533183.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381335287 is a prime.

It is a super-2 number, since 2×381335287² = 290833202222744738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381336287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190667643 + 190667644.

It is an arithmetic number, because the mean of its divisors is an integer number (190667644).

Almost surely, 2^381335287 is an apocalyptic number.

381335287 is a deficient number, since it is larger than the sum of its proper divisors (1).

381335287 is an equidigital number, since it uses as much as digits as its factorization.

381335287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 40.

The square root of 381335287 is about 19527.8080439152. The cubic root of 381335287 is about 725.1630466429.

The spelling of 381335287 in words is "three hundred eighty-one million, three hundred thirty-five thousand, two hundred eighty-seven".