16249949 has 4 divisors (see below), whose sum is σ = 16308060. Its totient is φ = 16191840.

The previous prime is 16249927. The next prime is 16249951. The reversal of 16249949 is 94994261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9721924 + 6528025 = 3118^2 + 2555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16249949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16249049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28634 + ... + 29195.

It is an arithmetic number, because the mean of its divisors is an integer number (4077015).

Almost surely, 2^16249949 is an apocalyptic number.

It is an amenable number.

16249949 is a deficient number, since it is larger than the sum of its proper divisors (58111).

16249949 is an equidigital number, since it uses as much as digits as its factorization.

16249949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58110.

The product of its digits is 139968, while the sum is 44.

The square root of 16249949 is about 4031.1225483728. The cubic root of 16249949 is about 253.2895859746.

The spelling of 16249949 in words is "sixteen million, two hundred forty-nine thousand, nine hundred forty-nine".