202640623 has 2 divisors, whose sum is σ = 202640624. Its totient is φ = 202640622.

The previous prime is 202640617. The next prime is 202640657. The reversal of 202640623 is 326046202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 202640623 - 2⁵ = 202640591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202640423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101320311 + 101320312.

It is an arithmetic number, because the mean of its divisors is an integer number (101320312).

Almost surely, 2^202640623 is an apocalyptic number.

202640623 is a deficient number, since it is larger than the sum of its proper divisors (1).

202640623 is an equidigital number, since it uses as much as digits as its factorization.

202640623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 202640623 is about 14235.1896018283. The cubic root of 202640623 is about 587.3660456933.

Adding to 202640623 its reverse (326046202), we get a palindrome (528686825).

The spelling of 202640623 in words is "two hundred two million, six hundred forty thousand, six hundred twenty-three".