381475751 has 2 divisors, whose sum is σ = 381475752. Its totient is φ = 381475750.

The previous prime is 381475709. The next prime is 381475763. The reversal of 381475751 is 157574183.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 381475751 - 2¹⁸ = 381213607 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 381475699 and 381475708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381475771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190737875 + 190737876.

It is an arithmetic number, because the mean of its divisors is an integer number (190737876).

Almost surely, 2^381475751 is an apocalyptic number.

381475751 is a deficient number, since it is larger than the sum of its proper divisors (1).

381475751 is an equidigital number, since it uses as much as digits as its factorization.

381475751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 117600, while the sum is 41.

The square root of 381475751 is about 19531.4042249911. The cubic root of 381475751 is about 725.2520731083.

The spelling of 381475751 in words is "three hundred eighty-one million, four hundred seventy-five thousand, seven hundred fifty-one".