381517601 has 2 divisors, whose sum is σ = 381517602. Its totient is φ = 381517600.

The previous prime is 381517597. The next prime is 381517639. The reversal of 381517601 is 106715183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 293608225 + 87909376 = 17135^2 + 9376^2 .

It is a cyclic number.

It is not a de Polignac number, because 381517601 - 2² = 381517597 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (381517681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190758800 + 190758801.

It is an arithmetic number, because the mean of its divisors is an integer number (190758801).

Almost surely, 2^381517601 is an apocalyptic number.

It is an amenable number.

381517601 is a deficient number, since it is larger than the sum of its proper divisors (1).

381517601 is an equidigital number, since it uses as much as digits as its factorization.

381517601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 381517601 is about 19532.4755471497. The cubic root of 381517601 is about 725.2785935265.

The spelling of 381517601 in words is "three hundred eighty-one million, five hundred seventeen thousand, six hundred one".