8039427397 has 2 divisors, whose sum is σ = 8039427398. Its totient is φ = 8039427396.

The previous prime is 8039427359. The next prime is 8039427427. The reversal of 8039427397 is 7937249308.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6917914276 + 1121513121 = 83174^2 + 33489^2 .

It is a cyclic number.

It is not a de Polignac number, because 8039427397 - 2³¹ = 5891943749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8039427197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4019713698 + 4019713699.

It is an arithmetic number, because the mean of its divisors is an integer number (4019713699).

Almost surely, 2^8039427397 is an apocalyptic number.

It is an amenable number.

8039427397 is a deficient number, since it is larger than the sum of its proper divisors (1).

8039427397 is an equidigital number, since it uses as much as digits as its factorization.

8039427397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2286144, while the sum is 52.

The square root of 8039427397 is about 89662.8540533927. The cubic root of 8039427397 is about 2003.2802335095.

The spelling of 8039427397 in words is "eight billion, thirty-nine million, four hundred twenty-seven thousand, three hundred ninety-seven".