161308587 has 8 divisors (see below), whose sum is σ = 234630720. Its totient is φ = 97762760.

The previous prime is 161308577. The next prime is 161308601. The reversal of 161308587 is 785803161.

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 161308587 - 2¹⁰ = 161307563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161308507) 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, 2444037 + ... + 2444102.

It is an arithmetic number, because the mean of its divisors is an integer number (29328840).

Almost surely, 2^161308587 is an apocalyptic number.

161308587 is a deficient number, since it is larger than the sum of its proper divisors (73322133).

161308587 is a wasteful number, since it uses less digits than its factorization.

161308587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4888153.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 161308587 is about 12700.7317505725. The cubic root of 161308587 is about 544.3595281867.

The spelling of 161308587 in words is "one hundred sixty-one million, three hundred eight thousand, five hundred eighty-seven".