8161599 has 8 divisors (see below), whose sum is σ = 10901632. Its totient is φ = 5431320.

The previous prime is 8161591. The next prime is 8161607. The reversal of 8161599 is 9951618.

It is an interprime number because it is at equal distance from previous prime (8161591) and next prime (8161607).

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

It is not a de Polignac number, because 8161599 - 2³ = 8161591 is a prime.

It is a super-3 number, since 3×8161599³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161591) 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, 187 + ... + 4044.

It is an arithmetic number, because the mean of its divisors is an integer number (1362704).

Almost surely, 2^8161599 is an apocalyptic number.

8161599 is a deficient number, since it is larger than the sum of its proper divisors (2740033).

8161599 is a wasteful number, since it uses less digits than its factorization.

8161599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4877.

The product of its digits is 19440, while the sum is 39.

The square root of 8161599 is about 2856.8512386892. The cubic root of 8161599 is about 201.3376912959.

It can be divided in two parts, 816 and 1599, that added together give a triangular number (2415 = T₆₉).

The spelling of 8161599 in words is "eight million, one hundred sixty-one thousand, five hundred ninety-nine".