633608641 has 2 divisors, whose sum is σ = 633608642. Its totient is φ = 633608640.

The previous prime is 633608603. The next prime is 633608671. The reversal of 633608641 is 146806336.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 498584241 + 135024400 = 22329^2 + 11620^2 .

It is a cyclic number.

It is not a de Polignac number, because 633608641 - 2¹³ = 633600449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 633608641.

It is not a weakly prime, because it can be changed into another prime (633608671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316804320 + 316804321.

It is an arithmetic number, because the mean of its divisors is an integer number (316804321).

Almost surely, 2^633608641 is an apocalyptic number.

It is an amenable number.

633608641 is a deficient number, since it is larger than the sum of its proper divisors (1).

633608641 is an equidigital number, since it uses as much as digits as its factorization.

633608641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 633608641 is about 25171.5839986283. The cubic root of 633608641 is about 858.8955720947.

The spelling of 633608641 in words is "six hundred thirty-three million, six hundred eight thousand, six hundred forty-one".