11429891 has 4 divisors (see below), whose sum is σ = 12468984. Its totient is φ = 10390800.

The previous prime is 11429879. The next prime is 11429897. The reversal of 11429891 is 19892411.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11429891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11429897) 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, 519530 + ... + 519551.

It is an arithmetic number, because the mean of its divisors is an integer number (3117246).

Almost surely, 2^11429891 is an apocalyptic number.

11429891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11429891 is a deficient number, since it is larger than the sum of its proper divisors (1039093).

11429891 is a wasteful number, since it uses less digits than its factorization.

11429891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039092.

The product of its digits is 5184, while the sum is 35.

The square root of 11429891 is about 3380.8121805270. The cubic root of 11429891 is about 225.2582450481.

The spelling of 11429891 in words is "eleven million, four hundred twenty-nine thousand, eight hundred ninety-one".