164021263 has 8 divisors (see below), whose sum is σ = 189205632. Its totient is φ = 139275096.

The previous prime is 164021237. The next prime is 164021267. The reversal of 164021263 is 362120461.

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

It is a cyclic number.

It is not a de Polignac number, because 164021263 - 2¹³ = 164013071 is a prime.

It is a super-2 number, since 2×164021263² = 53805949432230338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164021267) 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 7 ways as a sum of consecutive naturals, for example, 108745 + ... + 110242.

It is an arithmetic number, because the mean of its divisors is an integer number (23650704).

Almost surely, 2^164021263 is an apocalyptic number.

164021263 is a deficient number, since it is larger than the sum of its proper divisors (25184369).

164021263 is a wasteful number, since it uses less digits than its factorization.

164021263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219101.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 164021263 is about 12807.0786286335. The cubic root of 164021263 is about 547.3940224253.

The spelling of 164021263 in words is "one hundred sixty-four million, twenty-one thousand, two hundred sixty-three".