16949893 has 4 divisors (see below), whose sum is σ = 17024140. Its totient is φ = 16875648.

The previous prime is 16949879. The next prime is 16949899. The reversal of 16949893 is 39894961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39894961 = 373 ⋅106957.

It can be written as a sum of positive squares in 2 ways, for example, as 16136289 + 813604 = 4017^2 + 902^2 .

It is a cyclic number.

It is not a de Polignac number, because 16949893 - 2⁹ = 16949381 is a prime.

It is a super-2 number, since 2×16949893² = 574597745422898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16949899) 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, 36780 + ... + 37237.

It is an arithmetic number, because the mean of its divisors is an integer number (4256035).

Almost surely, 2^16949893 is an apocalyptic number.

It is an amenable number.

16949893 is a deficient number, since it is larger than the sum of its proper divisors (74247).

16949893 is an equidigital number, since it uses as much as digits as its factorization.

16949893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74246.

The product of its digits is 419904, while the sum is 49.

The square root of 16949893 is about 4117.0247752473. The cubic root of 16949893 is about 256.8752845607.

The spelling of 16949893 in words is "sixteen million, nine hundred forty-nine thousand, eight hundred ninety-three".