115542789 has 4 divisors (see below), whose sum is σ = 154057056. Its totient is φ = 77028524.

The previous prime is 115542769. The next prime is 115542821. The reversal of 115542789 is 987245511.

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.

It is a cyclic number.

It is not a de Polignac number, because 115542789 - 2⁸ = 115542533 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 115542789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115542719) 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, 19257129 + ... + 19257134.

It is an arithmetic number, because the mean of its divisors is an integer number (38514264).

Almost surely, 2^115542789 is an apocalyptic number.

It is an amenable number.

115542789 is a deficient number, since it is larger than the sum of its proper divisors (38514267).

115542789 is an equidigital number, since it uses as much as digits as its factorization.

115542789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38514266.

The product of its digits is 100800, while the sum is 42.

The square root of 115542789 is about 10749.0831702057. The cubic root of 115542789 is about 487.0583002472.

The spelling of 115542789 in words is "one hundred fifteen million, five hundred forty-two thousand, seven hundred eighty-nine".