381064247 has 4 divisors (see below), whose sum is σ = 401120280. Its totient is φ = 361008216.

The previous prime is 381064241. The next prime is 381064261. The reversal of 381064247 is 742460183.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381064247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381064241) 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, 10027988 + ... + 10028025.

It is an arithmetic number, because the mean of its divisors is an integer number (100280070).

Almost surely, 2^381064247 is an apocalyptic number.

381064247 is a deficient number, since it is larger than the sum of its proper divisors (20056033).

381064247 is a wasteful number, since it uses less digits than its factorization.

381064247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20056032.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 381064247 is about 19520.8669633293. The cubic root of 381064247 is about 724.9911989419.

The spelling of 381064247 in words is "three hundred eighty-one million, sixty-four thousand, two hundred forty-seven".