118280657 has 4 divisors (see below), whose sum is σ = 129033456. Its totient is φ = 107527860.

The previous prime is 118280633. The next prime is 118280671. The reversal of 118280657 is 756082811.

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 not a de Polignac number, because 118280657 - 2¹⁴ = 118264273 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 118280657.

It is not an unprimeable number, because it can be changed into a prime (118280257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5376383 + ... + 5376404.

It is an arithmetic number, because the mean of its divisors is an integer number (32258364).

Almost surely, 2^118280657 is an apocalyptic number.

It is an amenable number.

118280657 is a deficient number, since it is larger than the sum of its proper divisors (10752799).

118280657 is a wasteful number, since it uses less digits than its factorization.

118280657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10752798.

The product of its (nonzero) digits is 26880, while the sum is 38.

The square root of 118280657 is about 10875.6911044770. The cubic root of 118280657 is about 490.8753712415.

The spelling of 118280657 in words is "one hundred eighteen million, two hundred eighty thousand, six hundred fifty-seven".