381247293 has 24 divisors (see below), whose sum is σ = 622449120. Its totient is φ = 206388000.

The previous prime is 381247283. The next prime is 381247301. The reversal of 381247293 is 392742183.

It is not a de Polignac number, because 381247293 - 2⁸ = 381247037 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381247283) 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 in 23 ways as a sum of consecutive naturals, for example, 65458 + ... + 71043.

It is an arithmetic number, because the mean of its divisors is an integer number (25935380).

Almost surely, 2^381247293 is an apocalyptic number.

It is an amenable number.

381247293 is a deficient number, since it is larger than the sum of its proper divisors (241201827).

381247293 is a wasteful number, since it uses less digits than its factorization.

381247293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136537 (or 136530 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 381247293 is about 19525.5548704768. The cubic root of 381247293 is about 725.1072646683.

The spelling of 381247293 in words is "three hundred eighty-one million, two hundred forty-seven thousand, two hundred ninety-three".