13149491 has 4 divisors (see below), whose sum is σ = 13721232. Its totient is φ = 12577752.

The previous prime is 13149473. The next prime is 13149497. The reversal of 13149491 is 19494131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19494131 = 59 ⋅330409.

It is a cyclic number.

It is not a de Polignac number, because 13149491 - 2⁶ = 13149427 is a prime.

It is a super-3 number, since 3×13149491³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13149497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285836 + ... + 285881.

It is an arithmetic number, because the mean of its divisors is an integer number (3430308).

Almost surely, 2^13149491 is an apocalyptic number.

13149491 is a deficient number, since it is larger than the sum of its proper divisors (571741).

13149491 is an equidigital number, since it uses as much as digits as its factorization.

13149491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571740.

The product of its digits is 3888, while the sum is 32.

The square root of 13149491 is about 3626.2226903487. Note that the first 3 decimals coincide. The cubic root of 13149491 is about 236.0313266373.

The spelling of 13149491 in words is "thirteen million, one hundred forty-nine thousand, four hundred ninety-one".