121648658 has 4 divisors (see below), whose sum is σ = 182472990. Its totient is φ = 60824328.

The previous prime is 121648627. The next prime is 121648661. The reversal of 121648658 is 856846121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 856846121 = 17 ⋅50402713.

It can be written as a sum of positive squares in only one way, i.e., 121506529 + 142129 = 11023^2 + 377^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30412163 + ... + 30412166.

Almost surely, 2^121648658 is an apocalyptic number.

121648658 is a deficient number, since it is larger than the sum of its proper divisors (60824332).

121648658 is an equidigital number, since it uses as much as digits as its factorization.

121648658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60824331.

The product of its digits is 92160, while the sum is 41.

The square root of 121648658 is about 11029.4450449694. The cubic root of 121648658 is about 495.4910041428.

The spelling of 121648658 in words is "one hundred twenty-one million, six hundred forty-eight thousand, six hundred fifty-eight".