164129890 has 8 divisors (see below), whose sum is σ = 295433820. Its totient is φ = 65651952.

The previous prime is 164129887. The next prime is 164129893. The reversal of 164129890 is 98921461.

It is an interprime number because it is at equal distance from previous prime (164129887) and next prime (164129893).

It can be written as a sum of positive squares in 2 ways, for example, as 163507369 + 622521 = 12787^2 + 789^2 .

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

It is not an unprimeable number, because it can be changed into a prime (164129893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8206485 + ... + 8206504.

Almost surely, 2^164129890 is an apocalyptic number.

164129890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164129890 is a deficient number, since it is larger than the sum of its proper divisors (131303930).

164129890 is a wasteful number, since it uses less digits than its factorization.

164129890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16412996.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 164129890 is about 12811.3188236028. The cubic root of 164129890 is about 547.5148373480.

The spelling of 164129890 in words is "one hundred sixty-four million, one hundred twenty-nine thousand, eight hundred ninety".