8390990953 has 2 divisors, whose sum is σ = 8390990954. Its totient is φ = 8390990952.

The previous prime is 8390990921. The next prime is 8390990963. The reversal of 8390990953 is 3590990938.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6820612569 + 1570378384 = 82587^2 + 39628^2 .

It is a cyclic number.

It is not a de Polignac number, because 8390990953 - 2⁵ = 8390990921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8390990894 and 8390990903.

It is not a weakly prime, because it can be changed into another prime (8390990903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4195495476 + 4195495477.

It is an arithmetic number, because the mean of its divisors is an integer number (4195495477).

Almost surely, 2^8390990953 is an apocalyptic number.

It is an amenable number.

8390990953 is a deficient number, since it is larger than the sum of its proper divisors (1).

8390990953 is an equidigital number, since it uses as much as digits as its factorization.

8390990953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2361960, while the sum is 55.

The square root of 8390990953 is about 91602.3523333326. The cubic root of 8390990953 is about 2032.0657264820.

The spelling of 8390990953 in words is "eight billion, three hundred ninety million, nine hundred ninety thousand, nine hundred fifty-three".