15493849 has 6 divisors (see below), whose sum is σ = 18023514. Its totient is φ = 13280400.

The previous prime is 15493843. The next prime is 15493871. The reversal of 15493849 is 94839451.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15366400 + 127449 = 3920^2 + 357^2 .

It is not a de Polignac number, because 15493849 - 2¹⁹ = 14969561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15493843) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 158052 + ... + 158149.

It is an arithmetic number, because the mean of its divisors is an integer number (3003919).

Almost surely, 2^15493849 is an apocalyptic number.

It is an amenable number.

15493849 is a deficient number, since it is larger than the sum of its proper divisors (2529665).

15493849 is an equidigital number, since it uses as much as digits as its factorization.

15493849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316215 (or 316208 counting only the distinct ones).

The product of its digits is 155520, while the sum is 43.

The square root of 15493849 is about 3936.2226817090. Note that the first 3 decimals coincide. The cubic root of 15493849 is about 249.2985617783.

The spelling of 15493849 in words is "fifteen million, four hundred ninety-three thousand, eight hundred forty-nine".