641458429 has 2 divisors, whose sum is σ = 641458430. Its totient is φ = 641458428.

The previous prime is 641458427. The next prime is 641458457. The reversal of 641458429 is 924854146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 628855929 + 12602500 = 25077^2 + 3550^2 .

It is a cyclic number.

It is not a de Polignac number, because 641458429 - 2¹ = 641458427 is a prime.

It is a super-2 number, since 2×641458429² = 822937832270296082, which contains 22 as substring.

Together with 641458427, 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 (641458423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320729214 + 320729215.

It is an arithmetic number, because the mean of its divisors is an integer number (320729215).

Almost surely, 2^641458429 is an apocalyptic number.

It is an amenable number.

641458429 is a deficient number, since it is larger than the sum of its proper divisors (1).

641458429 is an equidigital number, since it uses as much as digits as its factorization.

641458429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 43.

The square root of 641458429 is about 25327.0296126490. The cubic root of 641458429 is about 862.4279814963.

The spelling of 641458429 in words is "six hundred forty-one million, four hundred fifty-eight thousand, four hundred twenty-nine".