64090073 has 2 divisors, whose sum is σ = 64090074. Its totient is φ = 64090072.

The previous prime is 64090043. The next prime is 64090079. The reversal of 64090073 is 37009046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63552784 + 537289 = 7972^2 + 733^2 .

It is a cyclic number.

It is not a de Polignac number, because 64090073 - 2⁶ = 64090009 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (64090079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32045036 + 32045037.

It is an arithmetic number, because the mean of its divisors is an integer number (32045037).

Almost surely, 2^64090073 is an apocalyptic number.

It is an amenable number.

64090073 is a deficient number, since it is larger than the sum of its proper divisors (1).

64090073 is an equidigital number, since it uses as much as digits as its factorization.

64090073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 64090073 is about 8005.6275831442. The cubic root of 64090073 is about 400.1875641188.

The spelling of 64090073 in words is "sixty-four million, ninety thousand, seventy-three".