121724863 has 8 divisors (see below), whose sum is σ = 133045808. Its totient is φ = 110683584.

The previous prime is 121724839. The next prime is 121724881. The reversal of 121724863 is 368427121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121724863 - 2¹³ = 121716671 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 (121724893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69006 + ... + 70747.

It is an arithmetic number, because the mean of its divisors is an integer number (16630726).

Almost surely, 2^121724863 is an apocalyptic number.

121724863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121724863 is a deficient number, since it is larger than the sum of its proper divisors (11320945).

121724863 is a wasteful number, since it uses less digits than its factorization.

121724863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139833.

The product of its digits is 16128, while the sum is 34.

The square root of 121724863 is about 11032.8991203582. The cubic root of 121724863 is about 495.5944468793.

The spelling of 121724863 in words is "one hundred twenty-one million, seven hundred twenty-four thousand, eight hundred sixty-three".