11561389 has 8 divisors (see below), whose sum is σ = 13494528. Its totient is φ = 9698640.

The previous prime is 11561371. The next prime is 11561423. The reversal of 11561389 is 98316511.

11561389 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11561389 - 2¹⁹ = 11037101 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 (11561359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17242 + ... + 17899.

It is an arithmetic number, because the mean of its divisors is an integer number (1686816).

Almost surely, 2^11561389 is an apocalyptic number.

It is an amenable number.

11561389 is a deficient number, since it is larger than the sum of its proper divisors (1933139).

11561389 is an equidigital number, since it uses as much as digits as its factorization.

11561389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35195.

The product of its digits is 6480, while the sum is 34.

The square root of 11561389 is about 3400.2042585704. The cubic root of 11561389 is about 226.1187996285.

It can be divided in two parts, 115 and 61389, that added together give a square (61504 = 248²).

The spelling of 11561389 in words is "eleven million, five hundred sixty-one thousand, three hundred eighty-nine".