7865071397 has 2 divisors, whose sum is σ = 7865071398. Its totient is φ = 7865071396.

The previous prime is 7865071381. The next prime is 7865071433. The reversal of 7865071397 is 7931705687.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7794947521 + 70123876 = 88289^2 + 8374^2 .

It is a cyclic number.

It is not a de Polignac number, because 7865071397 - 2⁴ = 7865071381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7865071307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3932535698 + 3932535699.

It is an arithmetic number, because the mean of its divisors is an integer number (3932535699).

Almost surely, 2^7865071397 is an apocalyptic number.

It is an amenable number.

7865071397 is a deficient number, since it is larger than the sum of its proper divisors (1).

7865071397 is an equidigital number, since it uses as much as digits as its factorization.

7865071397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2222640, while the sum is 53.

The square root of 7865071397 is about 88685.2377625499. The cubic root of 7865071397 is about 1988.6921363525.

The spelling of 7865071397 in words is "seven billion, eight hundred sixty-five million, seventy-one thousand, three hundred ninety-seven".