121648718 has 4 divisors (see below), whose sum is σ = 182473080. Its totient is φ = 60824358.

The previous prime is 121648717. The next prime is 121648757. The reversal of 121648718 is 817846121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 817846121 = 23 ⋅35558527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121648717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30412178 + ... + 30412181.

It is an arithmetic number, because the mean of its divisors is an integer number (45618270).

Almost surely, 2^121648718 is an apocalyptic number.

121648718 is a deficient number, since it is larger than the sum of its proper divisors (60824362).

121648718 is an equidigital number, since it uses as much as digits as its factorization.

121648718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60824361.

The product of its digits is 21504, while the sum is 38.

The square root of 121648718 is about 11029.4477649609. The cubic root of 121648718 is about 495.4910856055.

The spelling of 121648718 in words is "one hundred twenty-one million, six hundred forty-eight thousand, seven hundred eighteen".