8390637973 has 2 divisors, whose sum is σ = 8390637974. Its totient is φ = 8390637972.

The previous prime is 8390637967. The next prime is 8390637979. The reversal of 8390637973 is 3797360938.

It is a balanced prime because it is at equal distance from previous prime (8390637967) and next prime (8390637979).

It can be written as a sum of positive squares in only one way, i.e., 8284094289 + 106543684 = 91017^2 + 10322^2 .

It is a cyclic number.

It is not a de Polignac number, because 8390637973 - 2⁹ = 8390637461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8390637979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4195318986 + 4195318987.

It is an arithmetic number, because the mean of its divisors is an integer number (4195318987).

Almost surely, 2^8390637973 is an apocalyptic number.

It is an amenable number.

8390637973 is a deficient number, since it is larger than the sum of its proper divisors (1).

8390637973 is an equidigital number, since it uses as much as digits as its factorization.

8390637973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5143824, while the sum is 55.

The square root of 8390637973 is about 91600.4256158234. The cubic root of 8390637973 is about 2032.0372320876.

The spelling of 8390637973 in words is "eight billion, three hundred ninety million, six hundred thirty-seven thousand, nine hundred seventy-three".