117257978 has 8 divisors (see below), whose sum is σ = 176522772. Its totient is φ = 58417056.

The previous prime is 117257977. The next prime is 117257989. The reversal of 117257978 is 879752711.

It can be written as a sum of positive squares in 2 ways, for example, as 116488849 + 769129 = 10793^2 + 877^2 .

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

It is not an unprimeable number, because it can be changed into a prime (117257977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105275 + ... + 106382.

Almost surely, 2^117257978 is an apocalyptic number.

117257978 is a deficient number, since it is larger than the sum of its proper divisors (59264794).

117257978 is a wasteful number, since it uses less digits than its factorization.

117257978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211936.

The product of its digits is 246960, while the sum is 47.

The square root of 117257978 is about 10828.5722973991. The cubic root of 117257978 is about 489.4565375453.

The spelling of 117257978 in words is "one hundred seventeen million, two hundred fifty-seven thousand, nine hundred seventy-eight".