161193837 has 16 divisors (see below), whose sum is σ = 251620992. Its totient is φ = 89863680.

The previous prime is 161193833. The next prime is 161193839. The reversal of 161193837 is 738391161.

It is not a de Polignac number, because 161193837 - 2² = 161193833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161193795 and 161193804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161193833) 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, 92748 + ... + 94469.

It is an arithmetic number, because the mean of its divisors is an integer number (15726312).

Almost surely, 2^161193837 is an apocalyptic number.

It is an amenable number.

161193837 is a deficient number, since it is larger than the sum of its proper divisors (90427155).

161193837 is a wasteful number, since it uses less digits than its factorization.

161193837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187268.

The product of its digits is 27216, while the sum is 39.

The square root of 161193837 is about 12696.2134906436. The cubic root of 161193837 is about 544.2304173215.

The spelling of 161193837 in words is "one hundred sixty-one million, one hundred ninety-three thousand, eight hundred thirty-seven".