8149491 has 28 divisors (see below), whose sum is σ = 13972912. Its totient is φ = 4653936.

The previous prime is 8149487. The next prime is 8149517. The reversal of 8149491 is 1949418.

8149491 is a `hidden beast` number, since 81 + 494 + 91 = 666.

It is not a de Polignac number, because 8149491 - 2² = 8149487 is a prime.

It is a super-3 number, since 3×8149491³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8149481) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 4305 + ... + 5901.

Almost surely, 2^8149491 is an apocalyptic number.

8149491 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

8149491 is a deficient number, since it is larger than the sum of its proper divisors (5823421).

8149491 is an equidigital number, since it uses as much as digits as its factorization.

8149491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622 (or 1607 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 8149491 is about 2854.7313358703. The cubic root of 8149491 is about 201.2380783288.

The spelling of 8149491 in words is "eight million, one hundred forty-nine thousand, four hundred ninety-one".