121647313 has 4 divisors (see below), whose sum is σ = 121681588. Its totient is φ = 121613040.

The previous prime is 121647283. The next prime is 121647343. The reversal of 121647313 is 313746121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 313746121 = 13 ⋅24134317.

It is an interprime number because it is at equal distance from previous prime (121647283) and next prime (121647343).

It can be written as a sum of positive squares in 2 ways, for example, as 63170704 + 58476609 = 7948^2 + 7647^2 .

It is a cyclic number.

It is not a de Polignac number, because 121647313 - 2²¹ = 119550161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121647343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11106 + ... + 19147.

It is an arithmetic number, because the mean of its divisors is an integer number (30420397).

Almost surely, 2^121647313 is an apocalyptic number.

It is an amenable number.

121647313 is a deficient number, since it is larger than the sum of its proper divisors (34275).

121647313 is an equidigital number, since it uses as much as digits as its factorization.

121647313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34274.

The product of its digits is 3024, while the sum is 28.

The square root of 121647313 is about 11029.3840716515. The cubic root of 121647313 is about 495.4891780154.

The spelling of 121647313 in words is "one hundred twenty-one million, six hundred forty-seven thousand, three hundred thirteen".