4963565921 has 2 divisors, whose sum is σ = 4963565922. Its totient is φ = 4963565920.

The previous prime is 4963565897. The next prime is 4963565923. The reversal of 4963565921 is 1295653694.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4577875600 + 385690321 = 67660^2 + 19639^2 .

It is a cyclic number.

It is not a de Polignac number, because 4963565921 - 2²⁶ = 4896457057 is a prime.

It is a super-2 number, since 2×4963565921² = 49273973304225156482, which contains 22 as substring.

Together with 4963565923, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4963565921.

It is not a weakly prime, because it can be changed into another prime (4963565923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2481782960 + 2481782961.

It is an arithmetic number, because the mean of its divisors is an integer number (2481782961).

Almost surely, 2^4963565921 is an apocalyptic number.

It is an amenable number.

4963565921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4963565921 is an equidigital number, since it uses as much as digits as its factorization.

4963565921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1749600, while the sum is 50.

The square root of 4963565921 is about 70452.5792359655. The cubic root of 4963565921 is about 1705.8123906369.

The spelling of 4963565921 in words is "four billion, nine hundred sixty-three million, five hundred sixty-five thousand, nine hundred twenty-one".