164377943 has 4 divisors (see below), whose sum is σ = 165577920. Its totient is φ = 163177968.

The previous prime is 164377921. The next prime is 164377973. The reversal of 164377943 is 349773461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 349773461 = 5009 ⋅69829.

It is a cyclic number.

It is not a de Polignac number, because 164377943 - 2⁸ = 164377687 is a prime.

It is a super-2 number, since 2×164377943² = 54040216289822498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164377894 and 164377903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164377973) 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, 599783 + ... + 600056.

It is an arithmetic number, because the mean of its divisors is an integer number (41394480).

Almost surely, 2^164377943 is an apocalyptic number.

164377943 is a deficient number, since it is larger than the sum of its proper divisors (1199977).

164377943 is a wasteful number, since it uses less digits than its factorization.

164377943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199976.

The product of its digits is 381024, while the sum is 44.

The square root of 164377943 is about 12820.9961781447. The cubic root of 164377943 is about 547.7905221252.

The spelling of 164377943 in words is "one hundred sixty-four million, three hundred seventy-seven thousand, nine hundred forty-three".