381061817 has 6 divisors (see below), whose sum is σ = 404796078. Its totient is φ = 358646144.

The previous prime is 381061781. The next prime is 381061819. The reversal of 381061817 is 718160183.

It can be written as a sum of positive squares in 3 ways, for example, as 184389241 + 196672576 = 13579^2 + 14024^2 .

It is not a de Polignac number, because 381061817 - 2⁶ = 381061753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381061819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 658988 + ... + 659565.

It is an arithmetic number, because the mean of its divisors is an integer number (67466013).

Almost surely, 2^381061817 is an apocalyptic number.

It is an amenable number.

381061817 is a deficient number, since it is larger than the sum of its proper divisors (23734261).

381061817 is a wasteful number, since it uses less digits than its factorization.

381061817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318587 (or 1318570 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 381061817 is about 19520.8047221420. The cubic root of 381061817 is about 724.9896578786.

The spelling of 381061817 in words is "three hundred eighty-one million, sixty-one thousand, eight hundred seventeen".