381092917 has 2 divisors, whose sum is σ = 381092918. Its totient is φ = 381092916.

The previous prime is 381092903. The next prime is 381092939. The reversal of 381092917 is 719290183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328298161 + 52794756 = 18119^2 + 7266^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381092917 is a prime.

It is a super-2 number, since 2×381092917² = 290463622775137778, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 381092917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381092947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190546458 + 190546459.

It is an arithmetic number, because the mean of its divisors is an integer number (190546459).

Almost surely, 2^381092917 is an apocalyptic number.

It is an amenable number.

381092917 is a deficient number, since it is larger than the sum of its proper divisors (1).

381092917 is an equidigital number, since it uses as much as digits as its factorization.

381092917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 381092917 is about 19521.6012919023. The cubic root of 381092917 is about 725.0093804573.

The spelling of 381092917 in words is "three hundred eighty-one million, ninety-two thousand, nine hundred seventeen".