64545973 has 2 divisors, whose sum is σ = 64545974. Its totient is φ = 64545972.

The previous prime is 64545961. The next prime is 64545979. The reversal of 64545973 is 37954546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60248644 + 4297329 = 7762^2 + 2073^2 .

It is a cyclic number.

It is not a de Polignac number, because 64545973 - 2¹⁷ = 64414901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64545979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32272986 + 32272987.

It is an arithmetic number, because the mean of its divisors is an integer number (32272987).

Almost surely, 2^64545973 is an apocalyptic number.

It is an amenable number.

64545973 is a deficient number, since it is larger than the sum of its proper divisors (1).

64545973 is an equidigital number, since it uses as much as digits as its factorization.

64545973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 43.

The square root of 64545973 is about 8034.0508462419. The cubic root of 64545973 is about 401.1342245468.

The spelling of 64545973 in words is "sixty-four million, five hundred forty-five thousand, nine hundred seventy-three".