17949449 has 4 divisors (see below), whose sum is σ = 20513664. Its totient is φ = 15385236.

The previous prime is 17949443. The next prime is 17949469. The reversal of 17949449 is 94494971.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94494971 = 23 ⋅4108477.

It is a cyclic number.

It is not a de Polignac number, because 17949449 - 2²⁴ = 1172233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17949443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1282097 + ... + 1282110.

It is an arithmetic number, because the mean of its divisors is an integer number (5128416).

Almost surely, 2^17949449 is an apocalyptic number.

It is an amenable number.

17949449 is a deficient number, since it is larger than the sum of its proper divisors (2564215).

17949449 is an equidigital number, since it uses as much as digits as its factorization.

17949449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564214.

The product of its digits is 326592, while the sum is 47.

The square root of 17949449 is about 4236.6790060140. The cubic root of 17949449 is about 261.8285740291.

The spelling of 17949449 in words is "seventeen million, nine hundred forty-nine thousand, four hundred forty-nine".