164720771 has 4 divisors (see below), whose sum is σ = 164909472. Its totient is φ = 164532072.

The previous prime is 164720749. The next prime is 164720797. The reversal of 164720771 is 177027461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164720771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164720741) 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, 93035 + ... + 94788.

It is an arithmetic number, because the mean of its divisors is an integer number (41227368).

Almost surely, 2^164720771 is an apocalyptic number.

164720771 is a deficient number, since it is larger than the sum of its proper divisors (188701).

164720771 is an equidigital number, since it uses as much as digits as its factorization.

164720771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188700.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 164720771 is about 12834.3590023032. The cubic root of 164720771 is about 548.1710831646.

The spelling of 164720771 in words is "one hundred sixty-four million, seven hundred twenty thousand, seven hundred seventy-one".