8149381 has 2 divisors, whose sum is σ = 8149382. Its totient is φ = 8149380.

The previous prime is 8149369. The next prime is 8149457. The reversal of 8149381 is 1839418.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4800481 + 3348900 = 2191^2 + 1830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8149381 is a prime.

It is a super-2 number, since 2×8149381² = 132824821366322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8149301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4074690 + 4074691.

It is an arithmetic number, because the mean of its divisors is an integer number (4074691).

Almost surely, 2^8149381 is an apocalyptic number.

It is an amenable number.

8149381 is a deficient number, since it is larger than the sum of its proper divisors (1).

8149381 is an equidigital number, since it uses as much as digits as its factorization.

8149381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 34.

The square root of 8149381 is about 2854.7120695440. The cubic root of 8149381 is about 201.2371729026.

The spelling of 8149381 in words is "eight million, one hundred forty-nine thousand, three hundred eighty-one".