161326007 has 4 divisors (see below), whose sum is σ = 161438040. Its totient is φ = 161213976.

The previous prime is 161326003. The next prime is 161326013. The reversal of 161326007 is 700623161.

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 161326007 - 2² = 161326003 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 (161326003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53828 + ... + 56745.

It is an arithmetic number, because the mean of its divisors is an integer number (40359510).

Almost surely, 2^161326007 is an apocalyptic number.

161326007 is a deficient number, since it is larger than the sum of its proper divisors (112033).

161326007 is a wasteful number, since it uses less digits than its factorization.

161326007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112032.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 161326007 is about 12701.4175193165. The cubic root of 161326007 is about 544.3791229312.

Adding to 161326007 its reverse (700623161), we get a palindrome (861949168).

The spelling of 161326007 in words is "one hundred sixty-one million, three hundred twenty-six thousand, seven".