421151189 has 2 divisors, whose sum is σ = 421151190. Its totient is φ = 421151188.

The previous prime is 421151179. The next prime is 421151201. The reversal of 421151189 is 981151124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 385808164 + 35343025 = 19642^2 + 5945^2 .

It is a cyclic number.

It is not a de Polignac number, because 421151189 - 2⁴ = 421151173 is a prime.

It is a super-2 number, since 2×421151189² = 354736647992227442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421151179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210575594 + 210575595.

It is an arithmetic number, because the mean of its divisors is an integer number (210575595).

Almost surely, 2^421151189 is an apocalyptic number.

It is an amenable number.

421151189 is a deficient number, since it is larger than the sum of its proper divisors (1).

421151189 is an equidigital number, since it uses as much as digits as its factorization.

421151189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 32.

The square root of 421151189 is about 20521.9684484700. The cubic root of 421151189 is about 749.5708294266.

The spelling of 421151189 in words is "four hundred twenty-one million, one hundred fifty-one thousand, one hundred eighty-nine".