161874682 has 4 divisors (see below), whose sum is σ = 242812026. Its totient is φ = 80937340.

The previous prime is 161874677. The next prime is 161874689. The reversal of 161874682 is 286478161.

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., 109181601 + 52693081 = 10449^2 + 7259^2 .

It is a super-2 number, since 2×161874682² = 52406825345202248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161874689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40468669 + ... + 40468672.

Almost surely, 2^161874682 is an apocalyptic number.

161874682 is a deficient number, since it is larger than the sum of its proper divisors (80937344).

161874682 is an equidigital number, since it uses as much as digits as its factorization.

161874682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80937343.

The product of its digits is 129024, while the sum is 43.

The square root of 161874682 is about 12722.9981529512. The cubic root of 161874682 is about 544.9955749718.

The spelling of 161874682 in words is "one hundred sixty-one million, eight hundred seventy-four thousand, six hundred eighty-two".