118581863 has 4 divisors (see below), whose sum is σ = 119669880. Its totient is φ = 117493848.

The previous prime is 118581839. The next prime is 118581871. The reversal of 118581863 is 368185811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 368185811 = 7 ⋅52597973.

It is a cyclic number.

It is not a de Polignac number, because 118581863 - 2¹⁴ = 118565479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 118581863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118581833) 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, 543845 + ... + 544062.

It is an arithmetic number, because the mean of its divisors is an integer number (29917470).

Almost surely, 2^118581863 is an apocalyptic number.

118581863 is a deficient number, since it is larger than the sum of its proper divisors (1088017).

118581863 is a wasteful number, since it uses less digits than its factorization.

118581863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088016.

The product of its digits is 46080, while the sum is 41.

The square root of 118581863 is about 10889.5299714910. The cubic root of 118581863 is about 491.2916953821.

The spelling of 118581863 in words is "one hundred eighteen million, five hundred eighty-one thousand, eight hundred sixty-three".