161204007 has 4 divisors (see below), whose sum is σ = 214938680. Its totient is φ = 107469336.

The previous prime is 161203981. The next prime is 161204027. The reversal of 161204007 is 700402161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 700402161 = 3 ⋅233467387.

It is not a de Polignac number, because 161204007 - 2¹⁰ = 161202983 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 (161204027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26867332 + ... + 26867337.

It is an arithmetic number, because the mean of its divisors is an integer number (53734670).

Almost surely, 2^161204007 is an apocalyptic number.

161204007 is a deficient number, since it is larger than the sum of its proper divisors (53734673).

161204007 is an equidigital number, since it uses as much as digits as its factorization.

161204007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53734672.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 161204007 is about 12696.6139974404. The cubic root of 161204007 is about 544.2418625626.

Adding to 161204007 its reverse (700402161), we get a palindrome (861606168).

The spelling of 161204007 in words is "one hundred sixty-one million, two hundred four thousand, seven".