164894474 has 4 divisors (see below), whose sum is σ = 247341714. Its totient is φ = 82447236.

The previous prime is 164894467. The next prime is 164894489. The reversal of 164894474 is 474498461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 474498461 = 8831 ⋅53731.

It can be written as a sum of positive squares in only one way, i.e., 151462249 + 13432225 = 12307^2 + 3665^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41223617 + ... + 41223620.

Almost surely, 2^164894474 is an apocalyptic number.

164894474 is a deficient number, since it is larger than the sum of its proper divisors (82447240).

164894474 is an equidigital number, since it uses as much as digits as its factorization.

164894474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82447239.

The product of its digits is 774144, while the sum is 47.

The square root of 164894474 is about 12841.1243277215. The cubic root of 164894474 is about 548.3637030960.

The spelling of 164894474 in words is "one hundred sixty-four million, eight hundred ninety-four thousand, four hundred seventy-four".