633988423 has 2 divisors, whose sum is σ = 633988424. Its totient is φ = 633988422.

The previous prime is 633988403. The next prime is 633988427. The reversal of 633988423 is 324889336.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 633988423 - 2⁵ = 633988391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (633988427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316994211 + 316994212.

It is an arithmetic number, because the mean of its divisors is an integer number (316994212).

Almost surely, 2^633988423 is an apocalyptic number.

633988423 is a deficient number, since it is larger than the sum of its proper divisors (1).

633988423 is an equidigital number, since it uses as much as digits as its factorization.

633988423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 46.

The square root of 633988423 is about 25179.1267322757. The cubic root of 633988423 is about 859.0671437905.

The spelling of 633988423 in words is "six hundred thirty-three million, nine hundred eighty-eight thousand, four hundred twenty-three".