402231623 has 2 divisors, whose sum is σ = 402231624. Its totient is φ = 402231622.

The previous prime is 402231617. The next prime is 402231631. The reversal of 402231623 is 326132204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402231623 - 2⁶ = 402231559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402239623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201115811 + 201115812.

It is an arithmetic number, because the mean of its divisors is an integer number (201115812).

Almost surely, 2^402231623 is an apocalyptic number.

402231623 is a deficient number, since it is larger than the sum of its proper divisors (1).

402231623 is an equidigital number, since it uses as much as digits as its factorization.

402231623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 402231623 is about 20055.7129766059. The cubic root of 402231623 is about 738.1739876404.

Adding to 402231623 its reverse (326132204), we get a palindrome (728363827).

The spelling of 402231623 in words is "four hundred two million, two hundred thirty-one thousand, six hundred twenty-three".