402230429 has 2 divisors, whose sum is σ = 402230430. Its totient is φ = 402230428.

The previous prime is 402230357. The next prime is 402230431. The reversal of 402230429 is 924032204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201583204 + 200647225 = 14198^2 + 14165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402230429 is a prime.

Together with 402230431, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 402230398 and 402230407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402230449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201115214 + 201115215.

It is an arithmetic number, because the mean of its divisors is an integer number (201115215).

Almost surely, 2^402230429 is an apocalyptic number.

It is an amenable number.

402230429 is a deficient number, since it is larger than the sum of its proper divisors (1).

402230429 is an equidigital number, since it uses as much as digits as its factorization.

402230429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 402230429 is about 20055.6832095045. The cubic root of 402230429 is about 738.1732572315.

The spelling of 402230429 in words is "four hundred two million, two hundred thirty thousand, four hundred twenty-nine".