430919989 has 2 divisors, whose sum is σ = 430919990. Its totient is φ = 430919988.

The previous prime is 430919987. The next prime is 430920013. The reversal of 430919989 is 989919034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 410062500 + 20857489 = 20250^2 + 4567^2 .

It is a cyclic number.

It is not a de Polignac number, because 430919989 - 2¹ = 430919987 is a prime.

Together with 430919987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (430919987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215459994 + 215459995.

It is an arithmetic number, because the mean of its divisors is an integer number (215459995).

Almost surely, 2^430919989 is an apocalyptic number.

It is an amenable number.

430919989 is a deficient number, since it is larger than the sum of its proper divisors (1).

430919989 is an equidigital number, since it uses as much as digits as its factorization.

430919989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 629856, while the sum is 52.

The square root of 430919989 is about 20758.6124054572. The cubic root of 430919989 is about 755.3221372876.

The spelling of 430919989 in words is "four hundred thirty million, nine hundred nineteen thousand, nine hundred eighty-nine".