16006091 has 4 divisors (see below), whose sum is σ = 16702032. Its totient is φ = 15310152.

The previous prime is 16006087. The next prime is 16006103. The reversal of 16006091 is 19060061.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16006091 - 2² = 16006087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 695917 = 16006091 / (1 + 6 + 0 + 0 + 6 + 0 + 9 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16006021) 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, 347936 + ... + 347981.

It is an arithmetic number, because the mean of its divisors is an integer number (4175508).

Almost surely, 2^16006091 is an apocalyptic number.

16006091 is a deficient number, since it is larger than the sum of its proper divisors (695941).

16006091 is an equidigital number, since it uses as much as digits as its factorization.

16006091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695940.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 16006091 is about 4000.7613025523. The cubic root of 16006091 is about 252.0161816686.

The spelling of 16006091 in words is "sixteen million, six thousand, ninety-one".