164377691 has 4 divisors (see below), whose sum is σ = 168200472. Its totient is φ = 160554912.

The previous prime is 164377687. The next prime is 164377693. The reversal of 164377691 is 196773461.

164377691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 164377691 - 2² = 164377687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164377693) 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, 1911326 + ... + 1911411.

It is an arithmetic number, because the mean of its divisors is an integer number (42050118).

Almost surely, 2^164377691 is an apocalyptic number.

164377691 is a deficient number, since it is larger than the sum of its proper divisors (3822781).

164377691 is an equidigital number, since it uses as much as digits as its factorization.

164377691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3822780.

The product of its digits is 190512, while the sum is 44.

The square root of 164377691 is about 12820.9863505114. The cubic root of 164377691 is about 547.7902421945.

The spelling of 164377691 in words is "one hundred sixty-four million, three hundred seventy-seven thousand, six hundred ninety-one".