381926747 has 4 divisors (see below), whose sum is σ = 390052896. Its totient is φ = 373800600.

The previous prime is 381926717. The next prime is 381926761. The reversal of 381926747 is 747629183.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 381926747 - 2¹⁶ = 381861211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 8126101 = 381926747 / (3 + 8 + 1 + 9 + 2 + 6 + 7 + 4 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381926717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4063004 + ... + 4063097.

It is an arithmetic number, because the mean of its divisors is an integer number (97513224).

Almost surely, 2^381926747 is an apocalyptic number.

381926747 is a deficient number, since it is larger than the sum of its proper divisors (8126149).

381926747 is an equidigital number, since it uses as much as digits as its factorization.

381926747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8126148.

The product of its digits is 508032, while the sum is 47.

The square root of 381926747 is about 19542.9462210794. The cubic root of 381926747 is about 725.5377679567.

The spelling of 381926747 in words is "three hundred eighty-one million, nine hundred twenty-six thousand, seven hundred forty-seven".