161860647 has 16 divisors (see below), whose sum is σ = 232727040. Its totient is φ = 99472992.

The previous prime is 161860631. The next prime is 161860649. The reversal of 161860647 is 746068161.

It is a happy number.

161860647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161860647 - 2⁴ = 161860631 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161860649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32254 + ... + 36932.

It is an arithmetic number, because the mean of its divisors is an integer number (14545440).

Almost surely, 2^161860647 is an apocalyptic number.

161860647 is a deficient number, since it is larger than the sum of its proper divisors (70866393).

161860647 is a wasteful number, since it uses less digits than its factorization.

161860647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5582.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 161860647 is about 12722.4465807485. The cubic root of 161860647 is about 544.9798236225.

The spelling of 161860647 in words is "one hundred sixty-one million, eight hundred sixty thousand, six hundred forty-seven".