450213187 has 2 divisors, whose sum is σ = 450213188. Its totient is φ = 450213186.

The previous prime is 450213173. The next prime is 450213191. The reversal of 450213187 is 781312054.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-450213187 is a prime.

It is equal to p_23863630 and since 450213187 and 23863630 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (450213107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225106593 + 225106594.

It is an arithmetic number, because the mean of its divisors is an integer number (225106594).

Almost surely, 2^450213187 is an apocalyptic number.

450213187 is a deficient number, since it is larger than the sum of its proper divisors (1).

450213187 is an equidigital number, since it uses as much as digits as its factorization.

450213187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 450213187 is about 21218.2277063849. The cubic root of 450213187 is about 766.4304260361.

It can be divided in two parts, 4502 and 13187, that added together give a square (17689 = 133²).

The spelling of 450213187 in words is "four hundred fifty million, two hundred thirteen thousand, one hundred eighty-seven".