164987402 has 8 divisors (see below), whose sum is σ = 249142500. Its totient is φ = 81939904.

The previous prime is 164987387. The next prime is 164987429. The reversal of 164987402 is 204789461.

It can be written as a sum of positive squares in 2 ways, for example, as 162588001 + 2399401 = 12751^2 + 1549^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 164987402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276527 + ... + 277122.

Almost surely, 2^164987402 is an apocalyptic number.

164987402 is a deficient number, since it is larger than the sum of its proper divisors (84155098).

164987402 is a wasteful number, since it uses less digits than its factorization.

164987402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553800.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 164987402 is about 12844.7421928196. The cubic root of 164987402 is about 548.4666957783.

The spelling of 164987402 in words is "one hundred sixty-four million, nine hundred eighty-seven thousand, four hundred two".