381047507 has 2 divisors, whose sum is σ = 381047508. Its totient is φ = 381047506.

The previous prime is 381047453. The next prime is 381047533. The reversal of 381047507 is 705740183.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381047507 is a prime.

It is a Chen prime.

It is equal to p_20378519 and since 381047507 and 20378519 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (381047207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190523753 + 190523754.

It is an arithmetic number, because the mean of its divisors is an integer number (190523754).

Almost surely, 2^381047507 is an apocalyptic number.

381047507 is a deficient number, since it is larger than the sum of its proper divisors (1).

381047507 is an equidigital number, since it uses as much as digits as its factorization.

381047507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 381047507 is about 19520.4381866801. The cubic root of 381047507 is about 724.9805825953.

The spelling of 381047507 in words is "three hundred eighty-one million, forty-seven thousand, five hundred seven".