121595893 has 2 divisors, whose sum is σ = 121595894. Its totient is φ = 121595892.

The previous prime is 121595891. The next prime is 121595911. The reversal of 121595893 is 398595121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117029124 + 4566769 = 10818^2 + 2137^2 .

It is an emirp because it is prime and its reverse (398595121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121595893 - 2¹ = 121595891 is a prime.

It is a super-2 number, since 2×121595893² = 29571122388934898, which contains 22 as substring.

Together with 121595891, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121595891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60797946 + 60797947.

It is an arithmetic number, because the mean of its divisors is an integer number (60797947).

Almost surely, 2^121595893 is an apocalyptic number.

It is an amenable number.

121595893 is a deficient number, since it is larger than the sum of its proper divisors (1).

121595893 is an equidigital number, since it uses as much as digits as its factorization.

121595893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 43.

The square root of 121595893 is about 11027.0527794148. The cubic root of 121595893 is about 495.4193541846.

The spelling of 121595893 in words is "one hundred twenty-one million, five hundred ninety-five thousand, eight hundred ninety-three".