16939143 has 12 divisors (see below), whose sum is σ = 26349960. Its totient is φ = 10424016.

The previous prime is 16939093. The next prime is 16939147. The reversal of 16939143 is 34193961.

It is not a de Polignac number, because 16939143 - 2¹² = 16935047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16939098 and 16939107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16939147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72273 + ... + 72506.

It is an arithmetic number, because the mean of its divisors is an integer number (2195830).

Almost surely, 2^16939143 is an apocalyptic number.

16939143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16939143 is a deficient number, since it is larger than the sum of its proper divisors (9410817).

16939143 is a wasteful number, since it uses less digits than its factorization.

16939143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144798 (or 144795 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 16939143 is about 4115.7190137326. The cubic root of 16939143 is about 256.8209677321.

The spelling of 16939143 in words is "sixteen million, nine hundred thirty-nine thousand, one hundred forty-three".