164420931 has 16 divisors (see below), whose sum is σ = 228098048. Its totient is φ = 105235200.

The previous prime is 164420929. The next prime is 164420939. The reversal of 164420931 is 139024461.

It is not a de Polignac number, because 164420931 - 2¹ = 164420929 is a prime.

It is a super-3 number, since 3×164420931³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164420939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4851 + ... + 18771.

It is an arithmetic number, because the mean of its divisors is an integer number (14256128).

Almost surely, 2^164420931 is an apocalyptic number.

164420931 is a deficient number, since it is larger than the sum of its proper divisors (63677117).

164420931 is a wasteful number, since it uses less digits than its factorization.

164420931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14082.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 164420931 is about 12822.6725373457. The cubic root of 164420931 is about 547.8382705559.

The spelling of 164420931 in words is "one hundred sixty-four million, four hundred twenty thousand, nine hundred thirty-one".