8195730397 has 8 divisors (see below), whose sum is σ = 8479459800. Its totient is φ = 7912075584.

The previous prime is 8195730391. The next prime is 8195730449. The reversal of 8195730397 is 7930375918.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1443164121 + 6752566276 = 37989^2 + 82174^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8195730397 - 2⁷ = 8195730269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8195730391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293979 + ... + 320647.

It is an arithmetic number, because the mean of its divisors is an integer number (1059932475).

Almost surely, 2^8195730397 is an apocalyptic number.

It is an amenable number.

8195730397 is a deficient number, since it is larger than the sum of its proper divisors (283729403).

8195730397 is a wasteful number, since it uses less digits than its factorization.

8195730397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37295.

The product of its (nonzero) digits is 1428840, while the sum is 52.

The square root of 8195730397 is about 90530.2733730546. The cubic root of 8195730397 is about 2016.1796233520.

The spelling of 8195730397 in words is "eight billion, one hundred ninety-five million, seven hundred thirty thousand, three hundred ninety-seven".