63190661 has 2 divisors, whose sum is σ = 63190662. Its totient is φ = 63190660.

The previous prime is 63190627. The next prime is 63190663. The reversal of 63190661 is 16609136.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38130625 + 25060036 = 6175^2 + 5006^2 .

It is a cyclic number.

It is not a de Polignac number, because 63190661 - 2⁶ = 63190597 is a prime.

Together with 63190663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63190663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31595330 + 31595331.

It is an arithmetic number, because the mean of its divisors is an integer number (31595331).

Almost surely, 2^63190661 is an apocalyptic number.

It is an amenable number.

63190661 is a deficient number, since it is larger than the sum of its proper divisors (1).

63190661 is an equidigital number, since it uses as much as digits as its factorization.

63190661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 63190661 is about 7949.2553739328. The cubic root of 63190661 is about 398.3067191982.

Adding to 63190661 its reverse (16609136), we get a palindrome (79799797).

The spelling of 63190661 in words is "sixty-three million, one hundred ninety thousand, six hundred sixty-one".