118257791 has 4 divisors (see below), whose sum is σ = 119363112. Its totient is φ = 117152472.

The previous prime is 118257773. The next prime is 118257823. The reversal of 118257791 is 197752811.

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 118257791 - 2¹⁰ = 118256767 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118254791) 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, 552500 + ... + 552713.

It is an arithmetic number, because the mean of its divisors is an integer number (29840778).

Almost surely, 2^118257791 is an apocalyptic number.

118257791 is a deficient number, since it is larger than the sum of its proper divisors (1105321).

118257791 is a wasteful number, since it uses less digits than its factorization.

118257791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105320.

The product of its digits is 35280, while the sum is 41.

The square root of 118257791 is about 10874.6398101270. The cubic root of 118257791 is about 490.8437372170.

The spelling of 118257791 in words is "one hundred eighteen million, two hundred fifty-seven thousand, seven hundred ninety-one".