12071899 has 4 divisors (see below), whose sum is σ = 13796464. Its totient is φ = 10347336.

The previous prime is 12071869. The next prime is 12071923. The reversal of 12071899 is 99817021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99817021 = 173 ⋅576977.

It is a cyclic number.

It is not a de Polignac number, because 12071899 - 2⁵ = 12071867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12071869) 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, 862272 + ... + 862285.

It is an arithmetic number, because the mean of its divisors is an integer number (3449116).

Almost surely, 2^12071899 is an apocalyptic number.

12071899 is a deficient number, since it is larger than the sum of its proper divisors (1724565).

12071899 is an equidigital number, since it uses as much as digits as its factorization.

12071899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724564.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 12071899 is about 3474.4638435304. The cubic root of 12071899 is about 229.3991817195.

The spelling of 12071899 in words is "twelve million, seventy-one thousand, eight hundred ninety-nine".