81160397 has 8 divisors (see below), whose sum is σ = 86126976. Its totient is φ = 76215232.

The previous prime is 81160369. The next prime is 81160403. The reversal of 81160397 is 79306118.

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 81160397 - 2¹⁴ = 81144013 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 (81160297) 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, 2828 + ... + 13050.

It is an arithmetic number, because the mean of its divisors is an integer number (10765872).

Almost surely, 2^81160397 is an apocalyptic number.

It is an amenable number.

81160397 is a deficient number, since it is larger than the sum of its proper divisors (4966579).

81160397 is a wasteful number, since it uses less digits than its factorization.

81160397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10707.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 81160397 is about 9008.9065374217. The cubic root of 81160397 is about 432.9602784706.

The spelling of 81160397 in words is "eighty-one million, one hundred sixty thousand, three hundred ninety-seven".