16376981 has 2 divisors, whose sum is σ = 16376982. Its totient is φ = 16376980.

The previous prime is 16376957. The next prime is 16377013. The reversal of 16376981 is 18967361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15928081 + 448900 = 3991^2 + 670^2 .

It is a cyclic number.

It is not a de Polignac number, because 16376981 - 2¹⁸ = 16114837 is a prime.

It is a super-2 number, since 2×16376981² = 536411013348722, 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 (16376911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8188490 + 8188491.

It is an arithmetic number, because the mean of its divisors is an integer number (8188491).

Almost surely, 2^16376981 is an apocalyptic number.

It is an amenable number.

16376981 is a deficient number, since it is larger than the sum of its proper divisors (1).

16376981 is an equidigital number, since it uses as much as digits as its factorization.

16376981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 16376981 is about 4046.8482798346. The cubic root of 16376981 is about 253.9478937073.

The spelling of 16376981 in words is "sixteen million, three hundred seventy-six thousand, nine hundred eighty-one".