121343623 has 4 divisors (see below), whose sum is σ = 121546800. Its totient is φ = 121140448.

The previous prime is 121343617. The next prime is 121343639. The reversal of 121343623 is 326343121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121343623 - 2⁹ = 121343111 is a prime.

It is a super-2 number, since 2×121343623² = 29448549685532258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121343323) 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, 100690 + ... + 101887.

It is an arithmetic number, because the mean of its divisors is an integer number (30386700).

Almost surely, 2^121343623 is an apocalyptic number.

121343623 is a deficient number, since it is larger than the sum of its proper divisors (203177).

121343623 is an equidigital number, since it uses as much as digits as its factorization.

121343623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203176.

The product of its digits is 2592, while the sum is 25.

The square root of 121343623 is about 11015.6081538878. The cubic root of 121343623 is about 495.0765082571.

Adding to 121343623 its reverse (326343121), we get a palindrome (447686744).

The spelling of 121343623 in words is "one hundred twenty-one million, three hundred forty-three thousand, six hundred twenty-three".