421151389 has 2 divisors, whose sum is σ = 421151390. Its totient is φ = 421151388.

The previous prime is 421151383. The next prime is 421151407. The reversal of 421151389 is 983151124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 390260025 + 30891364 = 19755^2 + 5558^2 .

It is a cyclic number.

It is not a de Polignac number, because 421151389 - 2¹¹ = 421149341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421151383) 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, 210575694 + 210575695.

It is an arithmetic number, because the mean of its divisors is an integer number (210575695).

Almost surely, 2^421151389 is an apocalyptic number.

It is an amenable number.

421151389 is a deficient number, since it is larger than the sum of its proper divisors (1).

421151389 is an equidigital number, since it uses as much as digits as its factorization.

421151389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 34.

The square root of 421151389 is about 20521.9733212964. The cubic root of 421151389 is about 749.5709480809.

The spelling of 421151389 in words is "four hundred twenty-one million, one hundred fifty-one thousand, three hundred eighty-nine".