11457989 has 4 divisors (see below), whose sum is σ = 11701824. Its totient is φ = 11214156.

The previous prime is 11457973. The next prime is 11457997. The reversal of 11457989 is 98975411.

11457989 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98975411 = 17 ⋅5822083.

It is a cyclic number.

It is not a de Polignac number, because 11457989 - 2⁴ = 11457973 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 (11457959) 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, 121847 + ... + 121940.

It is an arithmetic number, because the mean of its divisors is an integer number (2925456).

Almost surely, 2^11457989 is an apocalyptic number.

It is an amenable number.

11457989 is a deficient number, since it is larger than the sum of its proper divisors (243835).

11457989 is an equidigital number, since it uses as much as digits as its factorization.

11457989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243834.

The product of its digits is 90720, while the sum is 44.

The square root of 11457989 is about 3384.9651401455. The cubic root of 11457989 is about 225.4426774519.

The spelling of 11457989 in words is "eleven million, four hundred fifty-seven thousand, nine hundred eighty-nine".