16105949 has 4 divisors (see below), whose sum is σ = 16253820. Its totient is φ = 15958080.

The previous prime is 16105937. The next prime is 16105963. The reversal of 16105949 is 94950161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94950161 = 919 ⋅103319.

It can be written as a sum of positive squares in 2 ways, for example, as 9765625 + 6340324 = 3125^2 + 2518^2 .

It is a cyclic number.

It is not a de Polignac number, because 16105949 - 2¹² = 16101853 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 (16105909) 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, 73772 + ... + 73989.

It is an arithmetic number, because the mean of its divisors is an integer number (4063455).

Almost surely, 2^16105949 is an apocalyptic number.

It is an amenable number.

16105949 is a deficient number, since it is larger than the sum of its proper divisors (147871).

16105949 is a wasteful number, since it uses less digits than its factorization.

16105949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147870.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 16105949 is about 4013.2217730895. The cubic root of 16105949 is about 252.5391841944.

The spelling of 16105949 in words is "sixteen million, one hundred five thousand, nine hundred forty-nine".