429991 has 2 divisors, whose sum is σ = 429992. Its totient is φ = 429990.

The previous prime is 429973. The next prime is 430007. The reversal of 429991 is 199924.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 429991 - 2¹⁵ = 397223 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (429901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214995 + 214996.

It is an arithmetic number, because the mean of its divisors is an integer number (214996).

2⁴²⁹⁹⁹¹ is an apocalyptic number.

429991 is a deficient number, since it is larger than the sum of its proper divisors (1).

429991 is an equidigital number, since it uses as much as digits as its factorization.

429991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 34.

The square root of 429991 is about 655.7369899586. The cubic root of 429991 is about 75.4778965456.

The spelling of 429991 in words is "four hundred twenty-nine thousand, nine hundred ninety-one".