118623557 has 8 divisors (see below), whose sum is σ = 128160984. Its totient is φ = 109145088.

The previous prime is 118623539. The next prime is 118623559. The reversal of 118623557 is 755326811.

It can be written as a sum of positive squares in 4 ways, for example, as 25867396 + 92756161 = 5086^2 + 9631^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 118623557 - 2⁶ = 118623493 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 118623557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118623559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10508 + ... + 18645.

It is an arithmetic number, because the mean of its divisors is an integer number (16020123).

Almost surely, 2^118623557 is an apocalyptic number.

It is an amenable number.

118623557 is a deficient number, since it is larger than the sum of its proper divisors (9537427).

118623557 is a wasteful number, since it uses less digits than its factorization.

118623557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29479.

The product of its digits is 50400, while the sum is 38.

The square root of 118623557 is about 10891.4442109392. Note that the first 3 decimals coincide. The cubic root of 118623557 is about 491.3492688736.

The spelling of 118623557 in words is "one hundred eighteen million, six hundred twenty-three thousand, five hundred fifty-seven".