16000091 has 4 divisors (see below), whose sum is σ = 16016784. Its totient is φ = 15983400.

The previous prime is 16000081. The next prime is 16000097. The reversal of 16000091 is 19000061.

16000091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19000061 = 67 ⋅283583.

It is a cyclic number.

It is not a de Polignac number, because 16000091 - 2¹⁴ = 15983707 is a prime.

16000091 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

16000091 is a modest number, since divided by 91 gives 16 as remainder.

It is not an unprimeable number, because it can be changed into a prime (16000097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6815 + ... + 8856.

It is an arithmetic number, because the mean of its divisors is an integer number (4004196).

Almost surely, 2^16000091 is an apocalyptic number.

16000091 is a deficient number, since it is larger than the sum of its proper divisors (16693).

16000091 is a wasteful number, since it uses less digits than its factorization.

16000091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16692.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 16000091 is about 4000.0113749838. The cubic root of 16000091 is about 251.9846876981.

The spelling of 16000091 in words is "sixteen million, ninety-one", and thus it is an aban number and an uban number.