9287381 has 2 divisors, whose sum is σ = 9287382. Its totient is φ = 9287380.

The previous prime is 9287363. The next prime is 9287413. The reversal of 9287381 is 1837829.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8151025 + 1136356 = 2855^2 + 1066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9287381 is a prime.

It is a super-2 number, since 2×9287381² = 172510891678322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9287081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4643690 + 4643691.

It is an arithmetic number, because the mean of its divisors is an integer number (4643691).

Almost surely, 2^9287381 is an apocalyptic number.

It is an amenable number.

9287381 is a deficient number, since it is larger than the sum of its proper divisors (1).

9287381 is an equidigital number, since it uses as much as digits as its factorization.

9287381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 9287381 is about 3047.5204675277. The cubic root of 9287381 is about 210.1992138308.

The spelling of 9287381 in words is "nine million, two hundred eighty-seven thousand, three hundred eighty-one".