438666190073 has 2 divisors, whose sum is σ = 438666190074. Its totient is φ = 438666190072.

The previous prime is 438666190007. The next prime is 438666190097. The reversal of 438666190073 is 370091666834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 433170636649 + 5495553424 = 658157^2 + 74132^2 .

It is a cyclic number.

It is not a de Polignac number, because 438666190073 - 2³⁶ = 369946713337 is a prime.

It is a super-2 number, since 2×438666190073² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 438666189997 and 438666190024.

It is not a weakly prime, because it can be changed into another prime (438666190003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219333095036 + 219333095037.

It is an arithmetic number, because the mean of its divisors is an integer number (219333095037).

Almost surely, 2^438666190073 is an apocalyptic number.

It is an amenable number.

438666190073 is a deficient number, since it is larger than the sum of its proper divisors (1).

438666190073 is an equidigital number, since it uses as much as digits as its factorization.

438666190073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 53.

The spelling of 438666190073 in words is "four hundred thirty-eight billion, six hundred sixty-six million, one hundred ninety thousand, seventy-three".