161894837 has 16 divisors (see below), whose sum is σ = 178924032. Its totient is φ = 145551360.

The previous prime is 161894833. The next prime is 161894867. The reversal of 161894837 is 738498161.

161894837 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 161894837 - 2² = 161894833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161894791 and 161894800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161894833) 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, 156512 + ... + 157542.

It is an arithmetic number, because the mean of its divisors is an integer number (11182752).

Almost surely, 2^161894837 is an apocalyptic number.

It is an amenable number.

161894837 is a deficient number, since it is larger than the sum of its proper divisors (17029195).

161894837 is a wasteful number, since it uses less digits than its factorization.

161894837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348.

The product of its digits is 290304, while the sum is 47.

The square root of 161894837 is about 12723.7901978931. The cubic root of 161894837 is about 545.0181931474.

The spelling of 161894837 in words is "one hundred sixty-one million, eight hundred ninety-four thousand, eight hundred thirty-seven".