403424389 has 2 divisors, whose sum is σ = 403424390. Its totient is φ = 403424388.

The previous prime is 403424387. The next prime is 403424443. The reversal of 403424389 is 983424304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228312100 + 175112289 = 15110^2 + 13233^2 .

It is a cyclic number.

It is not a de Polignac number, because 403424389 - 2¹ = 403424387 is a prime.

Together with 403424387, 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 (403424381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201712194 + 201712195.

It is an arithmetic number, because the mean of its divisors is an integer number (201712195).

Almost surely, 2^403424389 is an apocalyptic number.

It is an amenable number.

403424389 is a deficient number, since it is larger than the sum of its proper divisors (1).

403424389 is an equidigital number, since it uses as much as digits as its factorization.

403424389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 403424389 is about 20085.4272794979. The cubic root of 403424389 is about 738.9029208467.

The spelling of 403424389 in words is "four hundred three million, four hundred twenty-four thousand, three hundred eighty-nine".