63645949 has 2 divisors, whose sum is σ = 63645950. Its totient is φ = 63645948.

The previous prime is 63645929. The next prime is 63645961. The reversal of 63645949 is 94954636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60062500 + 3583449 = 7750^2 + 1893^2 .

It is a cyclic number.

It is not a de Polignac number, because 63645949 - 2⁵ = 63645917 is a prime.

It is a super-3 number, since 3×63645949³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 63645899 and 63645908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63645919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31822974 + 31822975.

It is an arithmetic number, because the mean of its divisors is an integer number (31822975).

Almost surely, 2^63645949 is an apocalyptic number.

It is an amenable number.

63645949 is a deficient number, since it is larger than the sum of its proper divisors (1).

63645949 is an equidigital number, since it uses as much as digits as its factorization.

63645949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 46.

The square root of 63645949 is about 7977.8411240134. The cubic root of 63645949 is about 399.2610293968.

The spelling of 63645949 in words is "sixty-three million, six hundred forty-five thousand, nine hundred forty-nine".