63091261 has 2 divisors, whose sum is σ = 63091262. Its totient is φ = 63091260.

The previous prime is 63091243. The next prime is 63091279. The reversal of 63091261 is 16219036.

It is a balanced prime because it is at equal distance from previous prime (63091243) and next prime (63091279).

It can be written as a sum of positive squares in only one way, i.e., 48916036 + 14175225 = 6994^2 + 3765^2 .

It is a cyclic number.

It is not a de Polignac number, because 63091261 - 2⁹ = 63090749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63091291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31545630 + 31545631.

It is an arithmetic number, because the mean of its divisors is an integer number (31545631).

Almost surely, 2^63091261 is an apocalyptic number.

It is an amenable number.

63091261 is a deficient number, since it is larger than the sum of its proper divisors (1).

63091261 is an equidigital number, since it uses as much as digits as its factorization.

63091261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 63091261 is about 7943.0007553821. Note that the first 3 decimals coincide. The cubic root of 63091261 is about 398.0977618149.

The spelling of 63091261 in words is "sixty-three million, ninety-one thousand, two hundred sixty-one".