161436473 has 4 divisors (see below), whose sum is σ = 176112528. Its totient is φ = 146760420.

The previous prime is 161436469. The next prime is 161436479. The reversal of 161436473 is 374634161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 374634161 = 11 ⋅34057651.

It is a cyclic number.

It is not a de Polignac number, because 161436473 - 2² = 161436469 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161436479) 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, 7338011 + ... + 7338032.

It is an arithmetic number, because the mean of its divisors is an integer number (44028132).

Almost surely, 2^161436473 is an apocalyptic number.

It is an amenable number.

161436473 is a deficient number, since it is larger than the sum of its proper divisors (14676055).

161436473 is a wasteful number, since it uses less digits than its factorization.

161436473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14676054.

The product of its digits is 36288, while the sum is 35.

The square root of 161436473 is about 12705.7653449133. The cubic root of 161436473 is about 544.5033468859.

It can be divided in two parts, 161 and 436473, that added together give a palindrome (436634).

The spelling of 161436473 in words is "one hundred sixty-one million, four hundred thirty-six thousand, four hundred seventy-three".