8157797 has 8 divisors (see below), whose sum is σ = 8468376. Its totient is φ = 7852032.

The previous prime is 8157769. The next prime is 8157803. The reversal of 8157797 is 7977518.

It can be written as a sum of positive squares in 4 ways, for example, as 4351396 + 3806401 = 2086^2 + 1951^2 .

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 8157797 - 2¹⁰ = 8156773 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 (8157727) 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, 2453 + ... + 4725.

It is an arithmetic number, because the mean of its divisors is an integer number (1058547).

Almost surely, 2^8157797 is an apocalyptic number.

It is an amenable number.

8157797 is a deficient number, since it is larger than the sum of its proper divisors (310579).

8157797 is a wasteful number, since it uses less digits than its factorization.

8157797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407.

The product of its digits is 123480, while the sum is 44.

The square root of 8157797 is about 2856.1857432597. The cubic root of 8157797 is about 201.3064227174.

It can be divided in two parts, 81577 and 97, that multiplied together give a square (7912969 = 2813²).

The spelling of 8157797 in words is "eight million, one hundred fifty-seven thousand, seven hundred ninety-seven".