63669401 has 2 divisors, whose sum is σ = 63669402. Its totient is φ = 63669400.

The previous prime is 63669373. The next prime is 63669427. The reversal of 63669401 is 10496636.

63669401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33408400 + 30261001 = 5780^2 + 5501^2 .

It is a cyclic number.

It is not a de Polignac number, because 63669401 - 2¹⁴ = 63653017 is a prime.

It is equal to p_3766580 and since 63669401 and 3766580 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (63669481) 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, 31834700 + 31834701.

It is an arithmetic number, because the mean of its divisors is an integer number (31834701).

Almost surely, 2^63669401 is an apocalyptic number.

It is an amenable number.

63669401 is a deficient number, since it is larger than the sum of its proper divisors (1).

63669401 is an equidigital number, since it uses as much as digits as its factorization.

63669401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 63669401 is about 7979.3108098382. The cubic root of 63669401 is about 399.3100627340.

The spelling of 63669401 in words is "sixty-three million, six hundred sixty-nine thousand, four hundred one".