381333737 has 2 divisors, whose sum is σ = 381333738. Its totient is φ = 381333736.

The previous prime is 381333713. The next prime is 381333779. The reversal of 381333737 is 737333183.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297079696 + 84254041 = 17236^2 + 9179^2 .

It is a cyclic number.

It is not a de Polignac number, because 381333737 - 2¹⁴ = 381317353 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 381333737.

It is not a weakly prime, because it can be changed into another prime (381333787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190666868 + 190666869.

It is an arithmetic number, because the mean of its divisors is an integer number (190666869).

Almost surely, 2^381333737 is an apocalyptic number.

It is an amenable number.

381333737 is a deficient number, since it is larger than the sum of its proper divisors (1).

381333737 is an equidigital number, since it uses as much as digits as its factorization.

381333737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 38.

The square root of 381333737 is about 19527.7683568809. The cubic root of 381333737 is about 725.1620641267.

The spelling of 381333737 in words is "three hundred eighty-one million, three hundred thirty-three thousand, seven hundred thirty-seven".