161860867 has 24 divisors (see below), whose sum is σ = 206841600. Its totient is φ = 125704656.

The previous prime is 161860841. The next prime is 161860871. The reversal of 161860867 is 768068161.

It is a de Polignac number, because none of the positive numbers 2^k-161860867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161860067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17634 + ... + 25192.

It is an arithmetic number, because the mean of its divisors is an integer number (8618400).

Almost surely, 2^161860867 is an apocalyptic number.

161860867 is a deficient number, since it is larger than the sum of its proper divisors (44980733).

161860867 is a wasteful number, since it uses less digits than its factorization.

161860867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7615 (or 7608 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 161860867 is about 12722.4552268813. The cubic root of 161860867 is about 544.9800705335.

The spelling of 161860867 in words is "one hundred sixty-one million, eight hundred sixty thousand, eight hundred sixty-seven".