163964477 has 8 divisors (see below), whose sum is σ = 167635776. Its totient is φ = 160329312.

The previous prime is 163964467. The next prime is 163964483. The reversal of 163964477 is 774469361.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163964477 - 2¹⁶ = 163898941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163964417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248 + ... + 18110.

It is an arithmetic number, because the mean of its divisors is an integer number (20954472).

Almost surely, 2^163964477 is an apocalyptic number.

It is an amenable number.

163964477 is a deficient number, since it is larger than the sum of its proper divisors (3671299).

163964477 is a wasteful number, since it uses less digits than its factorization.

163964477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18067.

The product of its digits is 762048, while the sum is 47.

The square root of 163964477 is about 12804.8614596176. The cubic root of 163964477 is about 547.3308438180.

The spelling of 163964477 in words is "one hundred sixty-three million, nine hundred sixty-four thousand, four hundred seventy-seven".