161113693 has 8 divisors (see below), whose sum is σ = 176781528. Its totient is φ = 145913664.

The previous prime is 161113691. The next prime is 161113699. The reversal of 161113693 is 396311161.

It can be written as a sum of positive squares in 4 ways, for example, as 24176889 + 136936804 = 4917^2 + 11702^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161113693 - 2¹ = 161113691 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 (161113691) 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, 116230 + ... + 117607.

It is an arithmetic number, because the mean of its divisors is an integer number (22097691).

Almost surely, 2^161113693 is an apocalyptic number.

161113693 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

161113693 is a deficient number, since it is larger than the sum of its proper divisors (15667835).

161113693 is a wasteful number, since it uses less digits than its factorization.

161113693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233903.

The product of its digits is 2916, while the sum is 31.

The square root of 161113693 is about 12693.0568816184. The cubic root of 161113693 is about 544.1402070215.

The spelling of 161113693 in words is "one hundred sixty-one million, one hundred thirteen thousand, six hundred ninety-three".