64948421 has 2 divisors, whose sum is σ = 64948422. Its totient is φ = 64948420.

The previous prime is 64948417. The next prime is 64948423. The reversal of 64948421 is 12484946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43428100 + 21520321 = 6590^2 + 4639^2 .

It is a cyclic number.

It is not a de Polignac number, because 64948421 - 2² = 64948417 is a prime.

Together with 64948423, 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 (64948423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32474210 + 32474211.

It is an arithmetic number, because the mean of its divisors is an integer number (32474211).

Almost surely, 2^64948421 is an apocalyptic number.

It is an amenable number.

64948421 is a deficient number, since it is larger than the sum of its proper divisors (1).

64948421 is an equidigital number, since it uses as much as digits as its factorization.

64948421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 38.

The square root of 64948421 is about 8059.0583196798. The cubic root of 64948421 is about 401.9661964266.

The spelling of 64948421 in words is "sixty-four million, nine hundred forty-eight thousand, four hundred twenty-one".