111457009 has 4 divisors (see below), whose sum is σ = 111671460. Its totient is φ = 111242560.

The previous prime is 111457001. The next prime is 111457019. The reversal of 111457009 is 900754111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 59213025 + 52243984 = 7695^2 + 7228^2 .

It is a cyclic number.

It is not a de Polignac number, because 111457009 - 2³ = 111457001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111457001) 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, 106444 + ... + 107485.

It is an arithmetic number, because the mean of its divisors is an integer number (27917865).

Almost surely, 2^111457009 is an apocalyptic number.

It is an amenable number.

111457009 is a deficient number, since it is larger than the sum of its proper divisors (214451).

111457009 is an equidigital number, since it uses as much as digits as its factorization.

111457009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214450.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 111457009 is about 10557.3201618593. The cubic root of 111457009 is about 481.2482110689.

The spelling of 111457009 in words is "one hundred eleven million, four hundred fifty-seven thousand, nine".