8491429 has 2 divisors, whose sum is σ = 8491430. Its totient is φ = 8491428.

The previous prime is 8491411. The next prime is 8491451. The reversal of 8491429 is 9241948.

It is a happy number.

8491429 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8398404 + 93025 = 2898^2 + 305^2 .

It is a cyclic number.

It is not a de Polignac number, because 8491429 - 2⁹ = 8490917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8491409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4245714 + 4245715.

It is an arithmetic number, because the mean of its divisors is an integer number (4245715).

Almost surely, 2^8491429 is an apocalyptic number.

It is an amenable number.

8491429 is a deficient number, since it is larger than the sum of its proper divisors (1).

8491429 is an equidigital number, since it uses as much as digits as its factorization.

8491429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 8491429 is about 2914.0056623143. The cubic root of 8491429 is about 204.0141362112.

It can be divided in two parts, 849 and 1429, that added together give a triangular number (2278 = T₆₇).

The spelling of 8491429 in words is "eight million, four hundred ninety-one thousand, four hundred twenty-nine".