64420117 has 2 divisors, whose sum is σ = 64420118. Its totient is φ = 64420116.

The previous prime is 64420067. The next prime is 64420121. The reversal of 64420117 is 71102446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51753636 + 12666481 = 7194^2 + 3559^2 .

It is a cyclic number.

It is not a de Polignac number, because 64420117 - 2⁷ = 64419989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64420091 and 64420100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64420817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32210058 + 32210059.

It is an arithmetic number, because the mean of its divisors is an integer number (32210059).

Almost surely, 2^64420117 is an apocalyptic number.

It is an amenable number.

64420117 is a deficient number, since it is larger than the sum of its proper divisors (1).

64420117 is an equidigital number, since it uses as much as digits as its factorization.

64420117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 64420117 is about 8026.2143629485. The cubic root of 64420117 is about 400.8733355747.

The spelling of 64420117 in words is "sixty-four million, four hundred twenty thousand, one hundred seventeen".