64422461 has 2 divisors, whose sum is σ = 64422462. Its totient is φ = 64422460.

The previous prime is 64422451. The next prime is 64422481. The reversal of 64422461 is 16422446.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59382436 + 5040025 = 7706^2 + 2245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64422461 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64422451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32211230 + 32211231.

It is an arithmetic number, because the mean of its divisors is an integer number (32211231).

Almost surely, 2^64422461 is an apocalyptic number.

It is an amenable number.

64422461 is a deficient number, since it is larger than the sum of its proper divisors (1).

64422461 is an equidigital number, since it uses as much as digits as its factorization.

64422461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 29.

The square root of 64422461 is about 8026.3603831376. The cubic root of 64422461 is about 400.8781975948.

The spelling of 64422461 in words is "sixty-four million, four hundred twenty-two thousand, four hundred sixty-one".