8185390373 has 2 divisors, whose sum is σ = 8185390374. Its totient is φ = 8185390372.

The previous prime is 8185390337. The next prime is 8185390471. The reversal of 8185390373 is 3730935818.

Together with previous prime (8185390337) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4904621089 + 3280769284 = 70033^2 + 57278^2 .

It is a cyclic number.

It is not a de Polignac number, because 8185390373 - 2⁸ = 8185390117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8185390303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4092695186 + 4092695187.

It is an arithmetic number, because the mean of its divisors is an integer number (4092695187).

Almost surely, 2^8185390373 is an apocalyptic number.

It is an amenable number.

8185390373 is a deficient number, since it is larger than the sum of its proper divisors (1).

8185390373 is an equidigital number, since it uses as much as digits as its factorization.

8185390373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 47.

The square root of 8185390373 is about 90473.1472482305. The cubic root of 8185390373 is about 2015.3313719624.

The spelling of 8185390373 in words is "eight billion, one hundred eighty-five million, three hundred ninety thousand, three hundred seventy-three".