11899427 has 4 divisors (see below), whose sum is σ = 11930880. Its totient is φ = 11867976.

The previous prime is 11899417. The next prime is 11899429. The reversal of 11899427 is 72499811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72499811 = 211 ⋅343601.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11899427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11899429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15152 + ... + 15917.

It is an arithmetic number, because the mean of its divisors is an integer number (2982720).

Almost surely, 2^11899427 is an apocalyptic number.

11899427 is a deficient number, since it is larger than the sum of its proper divisors (31453).

11899427 is an equidigital number, since it uses as much as digits as its factorization.

11899427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31452.

The product of its digits is 36288, while the sum is 41.

The square root of 11899427 is about 3449.5546089314. The cubic root of 11899427 is about 228.3014569433.

The spelling of 11899427 in words is "eleven million, eight hundred ninety-nine thousand, four hundred twenty-seven".