468721921 has 2 divisors, whose sum is σ = 468721922. Its totient is φ = 468721920.

The previous prime is 468721919. The next prime is 468721927. The reversal of 468721921 is 129127864.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 290873025 + 177848896 = 17055^2 + 13336^2 .

It is a cyclic number.

It is not a de Polignac number, because 468721921 - 2¹ = 468721919 is a prime.

Together with 468721919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (468721927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 234360960 + 234360961.

It is an arithmetic number, because the mean of its divisors is an integer number (234360961).

Almost surely, 2^468721921 is an apocalyptic number.

It is an amenable number.

468721921 is a deficient number, since it is larger than the sum of its proper divisors (1).

468721921 is an equidigital number, since it uses as much as digits as its factorization.

468721921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 40.

The square root of 468721921 is about 21649.9866281714. The cubic root of 468721921 is about 776.7926154265.

The spelling of 468721921 in words is "four hundred sixty-eight million, seven hundred twenty-one thousand, nine hundred twenty-one".