164237643 has 12 divisors (see below), whose sum is σ = 245412960. Its totient is φ = 105716016.

The previous prime is 164237639. The next prime is 164237657. The reversal of 164237643 is 346732461.

It is a happy number.

164237643 is a `hidden beast` number, since 1 + 6 + 4 + 2 + 3 + 7 + 643 = 666.

It is not a de Polignac number, because 164237643 - 2² = 164237639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 164237598 and 164237607.

It is not an unprimeable number, because it can be changed into a prime (164237743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 314371 + ... + 314892.

It is an arithmetic number, because the mean of its divisors is an integer number (20451080).

Almost surely, 2^164237643 is an apocalyptic number.

164237643 is a deficient number, since it is larger than the sum of its proper divisors (81175317).

164237643 is a wasteful number, since it uses less digits than its factorization.

164237643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629298 (or 629295 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 164237643 is about 12815.5235164234. The cubic root of 164237643 is about 547.6346275548.

The spelling of 164237643 in words is "one hundred sixty-four million, two hundred thirty-seven thousand, six hundred forty-three".