16937381 has 2 divisors, whose sum is σ = 16937382. Its totient is φ = 16937380.

The previous prime is 16937359. The next prime is 16937419. The reversal of 16937381 is 18373961.

It is an a-pointer prime, because the next prime (16937419) can be obtained adding 16937381 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16273156 + 664225 = 4034^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 16937381 - 2¹⁰ = 16936357 is a prime.

It is a super-2 number, since 2×16937381² = 573749750278322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16937311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8468690 + 8468691.

It is an arithmetic number, because the mean of its divisors is an integer number (8468691).

Almost surely, 2^16937381 is an apocalyptic number.

It is an amenable number.

16937381 is a deficient number, since it is larger than the sum of its proper divisors (1).

16937381 is an equidigital number, since it uses as much as digits as its factorization.

16937381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 38.

The square root of 16937381 is about 4115.5049507928. The cubic root of 16937381 is about 256.8120626331.

The spelling of 16937381 in words is "sixteen million, nine hundred thirty-seven thousand, three hundred eighty-one".