16117081 has 2 divisors, whose sum is σ = 16117082. Its totient is φ = 16117080.

The previous prime is 16117063. The next prime is 16117093. The reversal of 16117081 is 18071161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13505625 + 2611456 = 3675^2 + 1616^2 .

It is a cyclic number.

It is not a de Polignac number, because 16117081 - 2¹⁹ = 15592793 is a prime.

It is a super-3 number, since 3×16117081³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (16157081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8058540 + 8058541.

It is an arithmetic number, because the mean of its divisors is an integer number (8058541).

Almost surely, 2^16117081 is an apocalyptic number.

It is an amenable number.

16117081 is a deficient number, since it is larger than the sum of its proper divisors (1).

16117081 is an equidigital number, since it uses as much as digits as its factorization.

16117081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 25.

The square root of 16117081 is about 4014.6084491517. The cubic root of 16117081 is about 252.5973535651.

The spelling of 16117081 in words is "sixteen million, one hundred seventeen thousand, eighty-one".