162991874 has 4 divisors (see below), whose sum is σ = 244487814. Its totient is φ = 81495936.

The previous prime is 162991867. The next prime is 162991877. The reversal of 162991874 is 478199261.

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., 136726249 + 26265625 = 11693^2 + 5125^2 .

It is not an unprimeable number, because it can be changed into a prime (162991877) 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, 40747967 + ... + 40747970.

Almost surely, 2^162991874 is an apocalyptic number.

162991874 is a deficient number, since it is larger than the sum of its proper divisors (81495940).

162991874 is an equidigital number, since it uses as much as digits as its factorization.

162991874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81495939.

The product of its digits is 217728, while the sum is 47.

The square root of 162991874 is about 12766.8270921165. The cubic root of 162991874 is about 546.2464795281.

The spelling of 162991874 in words is "one hundred sixty-two million, nine hundred ninety-one thousand, eight hundred seventy-four".