16217949 has 16 divisors (see below), whose sum is σ = 24978240. Its totient is φ = 9250560.

The previous prime is 16217939. The next prime is 16217959. The reversal of 16217949 is 94971261.

It is an interprime number because it is at equal distance from previous prime (16217939) and next prime (16217959).

It is not a de Polignac number, because 16217949 - 2⁴ = 16217933 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16217939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13894 + ... + 15015.

It is an arithmetic number, because the mean of its divisors is an integer number (1561140).

Almost surely, 2^16217949 is an apocalyptic number.

It is an amenable number.

16217949 is a deficient number, since it is larger than the sum of its proper divisors (8760291).

16217949 is a wasteful number, since it uses less digits than its factorization.

16217949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28940.

The product of its digits is 27216, while the sum is 39.

The square root of 16217949 is about 4027.1514746779. The cubic root of 16217949 is about 253.1232143145.

The spelling of 16217949 in words is "sixteen million, two hundred seventeen thousand, nine hundred forty-nine".