164647442 has 8 divisors (see below), whose sum is σ = 255487500. Its totient is φ = 79484944.

The previous prime is 164647433. The next prime is 164647451. The reversal of 164647442 is 244746461.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (164647433) and next prime (164647451).

It can be written as a sum of positive squares in 2 ways, for example, as 150577441 + 14070001 = 12271^2 + 3751^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 164647396 and 164647405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1419317 + ... + 1419432.

Almost surely, 2^164647442 is an apocalyptic number.

164647442 is a deficient number, since it is larger than the sum of its proper divisors (90840058).

164647442 is a wasteful number, since it uses less digits than its factorization.

164647442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838780.

The product of its digits is 129024, while the sum is 38.

The square root of 164647442 is about 12831.5019385885. The cubic root of 164647442 is about 548.0897277019.

The spelling of 164647442 in words is "one hundred sixty-four million, six hundred forty-seven thousand, four hundred forty-two".