16709381 has 8 divisors (see below), whose sum is σ = 18170880. Its totient is φ = 15273072.

The previous prime is 16709323. The next prime is 16709383. The reversal of 16709381 is 18390761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16709381 is a prime.

It is a super-2 number, since 2×16709381² = 558406826806322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16709383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4901 + ... + 7578.

It is an arithmetic number, because the mean of its divisors is an integer number (2271360).

Almost surely, 2^16709381 is an apocalyptic number.

It is an amenable number.

16709381 is a deficient number, since it is larger than the sum of its proper divisors (1461499).

16709381 is a wasteful number, since it uses less digits than its factorization.

16709381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12595.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 16709381 is about 4087.7109731487. The cubic root of 16709381 is about 255.6545072874.

The spelling of 16709381 in words is "sixteen million, seven hundred nine thousand, three hundred eighty-one".