63641401 has 2 divisors, whose sum is σ = 63641402. Its totient is φ = 63641400.

The previous prime is 63641381. The next prime is 63641423. The reversal of 63641401 is 10414636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47279376 + 16362025 = 6876^2 + 4045^2 .

It is a cyclic number.

It is not a de Polignac number, because 63641401 - 2¹⁷ = 63510329 is a prime.

It is not a weakly prime, because it can be changed into another prime (63641801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31820700 + 31820701.

It is an arithmetic number, because the mean of its divisors is an integer number (31820701).

Almost surely, 2^63641401 is an apocalyptic number.

It is an amenable number.

63641401 is a deficient number, since it is larger than the sum of its proper divisors (1).

63641401 is an equidigital number, since it uses as much as digits as its factorization.

63641401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 63641401 is about 7977.5560794018. The cubic root of 63641401 is about 399.2515190643.

The spelling of 63641401 in words is "sixty-three million, six hundred forty-one thousand, four hundred one".