11899723 has 4 divisors (see below), whose sum is σ = 12981528. Its totient is φ = 10817920.

The previous prime is 11899721. The next prime is 11899729. The reversal of 11899723 is 32799811.

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 11899723 - 2¹ = 11899721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11899721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 540886 + ... + 540907.

It is an arithmetic number, because the mean of its divisors is an integer number (3245382).

Almost surely, 2^11899723 is an apocalyptic number.

11899723 is a deficient number, since it is larger than the sum of its proper divisors (1081805).

11899723 is a wasteful number, since it uses less digits than its factorization.

11899723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081804.

The product of its digits is 27216, while the sum is 40.

The square root of 11899723 is about 3449.5975127542. The cubic root of 11899723 is about 228.3033499384.

The spelling of 11899723 in words is "eleven million, eight hundred ninety-nine thousand, seven hundred twenty-three".