163709972 has 12 divisors (see below), whose sum is σ = 288390816. Its totient is φ = 81312600.

The previous prime is 163709971. The next prime is 163710121. The reversal of 163709972 is 279907361.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163709971) 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, 134918 + ... + 136125.

It is an arithmetic number, because the mean of its divisors is an integer number (24032568).

Almost surely, 2^163709972 is an apocalyptic number.

It is an amenable number.

163709972 is a deficient number, since it is larger than the sum of its proper divisors (124680844).

163709972 is a wasteful number, since it uses less digits than its factorization.

163709972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271198 (or 271196 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 163709972 is about 12794.9197730974. The cubic root of 163709972 is about 547.0475089274.

The spelling of 163709972 in words is "one hundred sixty-three million, seven hundred nine thousand, nine hundred seventy-two".