121616893 has 4 divisors (see below), whose sum is σ = 126904608. Its totient is φ = 116329180.

The previous prime is 121616881. The next prime is 121616899. The reversal of 121616893 is 398616121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121616893 - 2¹⁷ = 121485821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121616899) 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, 2643823 + ... + 2643868.

It is an arithmetic number, because the mean of its divisors is an integer number (31726152).

Almost surely, 2^121616893 is an apocalyptic number.

It is an amenable number.

121616893 is a deficient number, since it is larger than the sum of its proper divisors (5287715).

121616893 is an equidigital number, since it uses as much as digits as its factorization.

121616893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5287714.

The product of its digits is 15552, while the sum is 37.

The square root of 121616893 is about 11028.0049419648. The cubic root of 121616893 is about 495.4478727124.

The spelling of 121616893 in words is "one hundred twenty-one million, six hundred sixteen thousand, eight hundred ninety-three".