450621893 has 2 divisors, whose sum is σ = 450621894. Its totient is φ = 450621892.

The previous prime is 450621887. The next prime is 450621931. The reversal of 450621893 is 398126054.

It is a happy number.

It is an a-pointer prime, because the next prime (450621931) can be obtained adding 450621893 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 441966529 + 8655364 = 21023^2 + 2942^2 .

It is a cyclic number.

It is not a de Polignac number, because 450621893 - 2¹⁰ = 450620869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450621883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225310946 + 225310947.

It is an arithmetic number, because the mean of its divisors is an integer number (225310947).

Almost surely, 2^450621893 is an apocalyptic number.

It is an amenable number.

450621893 is a deficient number, since it is larger than the sum of its proper divisors (1).

450621893 is an equidigital number, since it uses as much as digits as its factorization.

450621893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 450621893 is about 21227.8565333385. The cubic root of 450621893 is about 766.6622791389.

The spelling of 450621893 in words is "four hundred fifty million, six hundred twenty-one thousand, eight hundred ninety-three".