161113607 has 4 divisors (see below), whose sum is σ = 170590896. Its totient is φ = 151636320.

The previous prime is 161113591. The next prime is 161113609. The reversal of 161113607 is 706311161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161113607 - 2⁴ = 161113591 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 (161113609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4738619 + ... + 4738652.

It is an arithmetic number, because the mean of its divisors is an integer number (42647724).

Almost surely, 2^161113607 is an apocalyptic number.

161113607 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

161113607 is a deficient number, since it is larger than the sum of its proper divisors (9477289).

161113607 is an equidigital number, since it uses as much as digits as its factorization.

161113607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9477288.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 161113607 is about 12693.0534939391. The cubic root of 161113607 is about 544.1401102036.

Adding to 161113607 its reverse (706311161), we get a palindrome (867424768).

The spelling of 161113607 in words is "one hundred sixty-one million, one hundred thirteen thousand, six hundred seven".