429411781 has 2 divisors, whose sum is σ = 429411782. Its totient is φ = 429411780.

The previous prime is 429411743. The next prime is 429411793. The reversal of 429411781 is 187114924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 423330625 + 6081156 = 20575^2 + 2466^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-429411781 is a prime.

It is a super-2 number, since 2×429411781² = 368788955323183922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 429411781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (429411181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214705890 + 214705891.

It is an arithmetic number, because the mean of its divisors is an integer number (214705891).

Almost surely, 2^429411781 is an apocalyptic number.

It is an amenable number.

429411781 is a deficient number, since it is larger than the sum of its proper divisors (1).

429411781 is an equidigital number, since it uses as much as digits as its factorization.

429411781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 37.

The square root of 429411781 is about 20722.2532799886. The cubic root of 429411781 is about 754.4399050514.

The spelling of 429411781 in words is "four hundred twenty-nine million, four hundred eleven thousand, seven hundred eighty-one".