121643413 has 4 divisors (see below), whose sum is σ = 121680448. Its totient is φ = 121606380.

The previous prime is 121643341. The next prime is 121643419. The reversal of 121643413 is 314346121.

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 121643413 - 2⁹ = 121642901 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 (121643419) 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, 13053 + ... + 20338.

It is an arithmetic number, because the mean of its divisors is an integer number (30420112).

Almost surely, 2^121643413 is an apocalyptic number.

It is an amenable number.

121643413 is a deficient number, since it is larger than the sum of its proper divisors (37035).

121643413 is an equidigital number, since it uses as much as digits as its factorization.

121643413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37034.

The product of its digits is 1728, while the sum is 25.

The square root of 121643413 is about 11029.2072697905. The cubic root of 121643413 is about 495.4838828486.

Adding to 121643413 its reverse (314346121), we get a palindrome (435989534).

The spelling of 121643413 in words is "one hundred twenty-one million, six hundred forty-three thousand, four hundred thirteen".