8185990357 has 2 divisors, whose sum is σ = 8185990358. Its totient is φ = 8185990356.

The previous prime is 8185990313. The next prime is 8185990391. The reversal of 8185990357 is 7530995818.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5054356836 + 3131633521 = 71094^2 + 55961^2 .

It is a cyclic number.

It is not a de Polignac number, because 8185990357 - 2²⁷ = 8051772629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8185990298 and 8185990307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8185990157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4092995178 + 4092995179.

It is an arithmetic number, because the mean of its divisors is an integer number (4092995179).

Almost surely, 2^8185990357 is an apocalyptic number.

It is an amenable number.

8185990357 is a deficient number, since it is larger than the sum of its proper divisors (1).

8185990357 is an equidigital number, since it uses as much as digits as its factorization.

8185990357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2721600, while the sum is 55.

The square root of 8185990357 is about 90476.4630000532. The cubic root of 8185990357 is about 2015.3806116028.

The spelling of 8185990357 in words is "eight billion, one hundred eighty-five million, nine hundred ninety thousand, three hundred fifty-seven".