117542786 has 4 divisors (see below), whose sum is σ = 176314182. Its totient is φ = 58771392.

The previous prime is 117542749. The next prime is 117542801. The reversal of 117542786 is 687245711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 687245711 = 12583 ⋅54617.

It can be written as a sum of positive squares in only one way, i.e., 110355025 + 7187761 = 10505^2 + 2681^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 29385695 + ... + 29385698.

Almost surely, 2^117542786 is an apocalyptic number.

117542786 is a deficient number, since it is larger than the sum of its proper divisors (58771396).

117542786 is an equidigital number, since it uses as much as digits as its factorization.

117542786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58771395.

The product of its digits is 94080, while the sum is 41.

The square root of 117542786 is about 10841.7150857233. The cubic root of 117542786 is about 489.8524975989.

The spelling of 117542786 in words is "one hundred seventeen million, five hundred forty-two thousand, seven hundred eighty-six".