16291849 has 4 divisors (see below), whose sum is σ = 18619264. Its totient is φ = 13964436.

The previous prime is 16291837. The next prime is 16291853. The reversal of 16291849 is 94819261.

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: 94819261 = 1153 ⋅82237.

It is a cyclic number.

It is not a de Polignac number, because 16291849 - 2⁵ = 16291817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16291859) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1163697 + ... + 1163710.

It is an arithmetic number, because the mean of its divisors is an integer number (4654816).

Almost surely, 2^16291849 is an apocalyptic number.

It is an amenable number.

16291849 is a deficient number, since it is larger than the sum of its proper divisors (2327415).

16291849 is an equidigital number, since it uses as much as digits as its factorization.

16291849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327414.

The product of its digits is 31104, while the sum is 40.

The square root of 16291849 is about 4036.3162661021. The cubic root of 16291849 is about 253.5070989665.

The spelling of 16291849 in words is "sixteen million, two hundred ninety-one thousand, eight hundred forty-nine".