161872007 has 8 divisors (see below), whose sum is σ = 176971392. Its totient is φ = 146836600.

The previous prime is 161871989. The next prime is 161872057. The reversal of 161872007 is 700278161.

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 161872007 - 2¹² = 161867911 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 (161872057) 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, 10619 + ... + 20892.

It is an arithmetic number, because the mean of its divisors is an integer number (22121424).

Almost surely, 2^161872007 is an apocalyptic number.

161872007 is a deficient number, since it is larger than the sum of its proper divisors (15099385).

161872007 is a wasteful number, since it uses less digits than its factorization.

161872007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31989.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 161872007 is about 12722.8930279241. The cubic root of 161872007 is about 544.9925729145.

The spelling of 161872007 in words is "one hundred sixty-one million, eight hundred seventy-two thousand, seven".