161323407 has 20 divisors (see below), whose sum is σ = 275417296. Its totient is φ = 92184480.

The previous prime is 161323373. The next prime is 161323427. The reversal of 161323407 is 704323161.

161323407 is a `hidden beast` number, since 1 + 613 + 2 + 3 + 40 + 7 = 666.

It is not a de Polignac number, because 161323407 - 2¹⁰ = 161322383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161323427) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 141694 + ... + 142827.

Almost surely, 2^161323407 is an apocalyptic number.

161323407 is a deficient number, since it is larger than the sum of its proper divisors (114093889).

161323407 is an equidigital number, since it uses as much as digits as its factorization.

161323407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284540 (or 284531 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 161323407 is about 12701.3151681233. The cubic root of 161323407 is about 544.3761984320.

Adding to 161323407 its reverse (704323161), we get a palindrome (865646568).

The spelling of 161323407 in words is "one hundred sixty-one million, three hundred twenty-three thousand, four hundred seven".