63461861 has 2 divisors, whose sum is σ = 63461862. Its totient is φ = 63461860.

The previous prime is 63461819. The next prime is 63461863. The reversal of 63461861 is 16816436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59197636 + 4264225 = 7694^2 + 2065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63461861 is a prime.

Together with 63461863, 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 (63461863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31730930 + 31730931.

It is an arithmetic number, because the mean of its divisors is an integer number (31730931).

Almost surely, 2^63461861 is an apocalyptic number.

It is an amenable number.

63461861 is a deficient number, since it is larger than the sum of its proper divisors (1).

63461861 is an equidigital number, since it uses as much as digits as its factorization.

63461861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 35.

The square root of 63461861 is about 7966.2953121260. The cubic root of 63461861 is about 398.8757200303.

The spelling of 63461861 in words is "sixty-three million, four hundred sixty-one thousand, eight hundred sixty-one".