429981691 has 2 divisors, whose sum is σ = 429981692. Its totient is φ = 429981690.

The previous prime is 429981689. The next prime is 429981701. The reversal of 429981691 is 196189924.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 429981691 - 2¹ = 429981689 is a prime.

Together with 429981689, it forms a pair of twin primes.

It is a nialpdrome in base 12.

It is not a weakly prime, because it can be changed into another prime (429981661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214990845 + 214990846.

It is an arithmetic number, because the mean of its divisors is an integer number (214990846).

Almost surely, 2^429981691 is an apocalyptic number.

429981691 is a deficient number, since it is larger than the sum of its proper divisors (1).

429981691 is an equidigital number, since it uses as much as digits as its factorization.

429981691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 49.

The square root of 429981691 is about 20735.9998794367. Note that the first 3 decimals coincide. The cubic root of 429981691 is about 754.7735186066.

The spelling of 429981691 in words is "four hundred twenty-nine million, nine hundred eighty-one thousand, six hundred ninety-one".