161774234 has 4 divisors (see below), whose sum is σ = 242661354. Its totient is φ = 80887116.

The previous prime is 161774231. The next prime is 161774243. The reversal of 161774234 is 432477161.

161774234 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 112423609 + 49350625 = 10603^2 + 7025^2 .

It is a super-3 number, since 3×161774234³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161774194 and 161774203.

It is not an unprimeable number, because it can be changed into a prime (161774231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40443557 + ... + 40443560.

Almost surely, 2^161774234 is an apocalyptic number.

161774234 is a deficient number, since it is larger than the sum of its proper divisors (80887120).

161774234 is an equidigital number, since it uses as much as digits as its factorization.

161774234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80887119.

The product of its digits is 28224, while the sum is 35.

The square root of 161774234 is about 12719.0500431439. The cubic root of 161774234 is about 544.8828230534.

The spelling of 161774234 in words is "one hundred sixty-one million, seven hundred seventy-four thousand, two hundred thirty-four".