402040229 has 2 divisors, whose sum is σ = 402040230. Its totient is φ = 402040228.

The previous prime is 402040201. The next prime is 402040231. The reversal of 402040229 is 922040204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 338008225 + 64032004 = 18385^2 + 8002^2 .

It is a cyclic number.

It is not a de Polignac number, because 402040229 - 2²⁰ = 400991653 is a prime.

Together with 402040231, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402040729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201020114 + 201020115.

It is an arithmetic number, because the mean of its divisors is an integer number (201020115).

Almost surely, 2^402040229 is an apocalyptic number.

It is an amenable number.

402040229 is a deficient number, since it is larger than the sum of its proper divisors (1).

402040229 is an equidigital number, since it uses as much as digits as its factorization.

402040229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 402040229 is about 20050.9408507431. The cubic root of 402040229 is about 738.0568872113.

The spelling of 402040229 in words is "four hundred two million, forty thousand, two hundred twenty-nine".