63690541 has 2 divisors, whose sum is σ = 63690542. Its totient is φ = 63690540.

The previous prime is 63690533. The next prime is 63690563. The reversal of 63690541 is 14509636.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52272900 + 11417641 = 7230^2 + 3379^2 .

It is a cyclic number.

It is not a de Polignac number, because 63690541 - 2³ = 63690533 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 63690497 and 63690506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63690521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31845270 + 31845271.

It is an arithmetic number, because the mean of its divisors is an integer number (31845271).

Almost surely, 2^63690541 is an apocalyptic number.

It is an amenable number.

63690541 is a deficient number, since it is larger than the sum of its proper divisors (1).

63690541 is an equidigital number, since it uses as much as digits as its factorization.

63690541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 63690541 is about 7980.6353757079. The cubic root of 63690541 is about 399.3542518342.

The spelling of 63690541 in words is "sixty-three million, six hundred ninety thousand, five hundred forty-one".