16730381 has 2 divisors, whose sum is σ = 16730382. Its totient is φ = 16730380.

The previous prime is 16730333. The next prime is 16730387. The reversal of 16730381 is 18303761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16532356 + 198025 = 4066^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 16730381 - 2¹⁰ = 16729357 is a prime.

It is a super-2 number, since 2×16730381² = 559811296810322, 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 (16730387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8365190 + 8365191.

It is an arithmetic number, because the mean of its divisors is an integer number (8365191).

Almost surely, 2^16730381 is an apocalyptic number.

It is an amenable number.

16730381 is a deficient number, since it is larger than the sum of its proper divisors (1).

16730381 is an equidigital number, since it uses as much as digits as its factorization.

16730381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 16730381 is about 4090.2788413506. The cubic root of 16730381 is about 255.7615628612.

The spelling of 16730381 in words is "sixteen million, seven hundred thirty thousand, three hundred eighty-one".