11149391 has 4 divisors (see below), whose sum is σ = 12162984. Its totient is φ = 10135800.

The previous prime is 11149381. The next prime is 11149393. The reversal of 11149391 is 19394111.

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 11149391 - 2¹⁰ = 11148367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11149393) 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, 506780 + ... + 506801.

It is an arithmetic number, because the mean of its divisors is an integer number (3040746).

Almost surely, 2^11149391 is an apocalyptic number.

11149391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11149391 is a deficient number, since it is larger than the sum of its proper divisors (1013593).

11149391 is a wasteful number, since it uses less digits than its factorization.

11149391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1013592.

The product of its digits is 972, while the sum is 29.

The square root of 11149391 is about 3339.0703796117. The cubic root of 11149391 is about 223.4002811595.

The spelling of 11149391 in words is "eleven million, one hundred forty-nine thousand, three hundred ninety-one".