118780591 has 4 divisors (see below), whose sum is σ = 118806184. Its totient is φ = 118755000.

The previous prime is 118780573. The next prime is 118780601. The reversal of 118780591 is 195087811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195087811 = 3943 ⋅49477.

It is a cyclic number.

It is not a de Polignac number, because 118780591 - 2¹⁷ = 118649519 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 (118780091) 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, 3660 + ... + 15841.

It is an arithmetic number, because the mean of its divisors is an integer number (29701546).

Almost surely, 2^118780591 is an apocalyptic number.

118780591 is a deficient number, since it is larger than the sum of its proper divisors (25593).

118780591 is an equidigital number, since it uses as much as digits as its factorization.

118780591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25592.

The product of its (nonzero) digits is 20160, while the sum is 40.

The square root of 118780591 is about 10898.6508798108. The cubic root of 118780591 is about 491.5659895108.

The spelling of 118780591 in words is "one hundred eighteen million, seven hundred eighty thousand, five hundred ninety-one".