64420133 has 2 divisors, whose sum is σ = 64420134. Its totient is φ = 64420132.

The previous prime is 64420129. The next prime is 64420141. The reversal of 64420133 is 33102446.

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., 64032004 + 388129 = 8002^2 + 623^2 .

It is a cyclic number.

It is not a de Polignac number, because 64420133 - 2² = 64420129 is a prime.

It is a zygodrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 64420099 and 64420108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64422133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32210066 + 32210067.

It is an arithmetic number, because the mean of its divisors is an integer number (32210067).

Almost surely, 2^64420133 is an apocalyptic number.

It is an amenable number.

64420133 is a deficient number, since it is larger than the sum of its proper divisors (1).

64420133 is an equidigital number, since it uses as much as digits as its factorization.

64420133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 64420133 is about 8026.2153596823. The cubic root of 64420133 is about 400.8733687630.

Adding to 64420133 its reverse (33102446), we get a palindrome (97522579).

The spelling of 64420133 in words is "sixty-four million, four hundred twenty thousand, one hundred thirty-three".