164631290 has 8 divisors (see below), whose sum is σ = 296336340. Its totient is φ = 65852512.

The previous prime is 164631287. The next prime is 164631293. The reversal of 164631290 is 92136461.

It is an interprime number because it is at equal distance from previous prime (164631287) and next prime (164631293).

It can be written as a sum of positive squares in 2 ways, for example, as 144264121 + 20367169 = 12011^2 + 4513^2 .

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 (164631293) 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 in 3 ways as a sum of consecutive naturals, for example, 8231555 + ... + 8231574.

Almost surely, 2^164631290 is an apocalyptic number.

164631290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164631290 is a deficient number, since it is larger than the sum of its proper divisors (131705050).

164631290 is a wasteful number, since it uses less digits than its factorization.

164631290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16463136.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 164631290 is about 12830.8725346330. The cubic root of 164631290 is about 548.0718044863.

The spelling of 164631290 in words is "one hundred sixty-four million, six hundred thirty-one thousand, two hundred ninety".