381333787 has 2 divisors, whose sum is σ = 381333788. Its totient is φ = 381333786.

The previous prime is 381333779. The next prime is 381333793. The reversal of 381333787 is 787333183.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 381333787 - 2³ = 381333779 is a prime.

It is a super-2 number, since 2×381333787² = 290830914215522738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (381333737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190666893 + 190666894.

It is an arithmetic number, because the mean of its divisors is an integer number (190666894).

Almost surely, 2^381333787 is an apocalyptic number.

381333787 is a deficient number, since it is larger than the sum of its proper divisors (1).

381333787 is an equidigital number, since it uses as much as digits as its factorization.

381333787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 43.

The square root of 381333787 is about 19527.7696371091. The cubic root of 381333787 is about 725.1620958208.

The spelling of 381333787 in words is "three hundred eighty-one million, three hundred thirty-three thousand, seven hundred eighty-seven".