29978163 has 6 divisors (see below), whose sum is σ = 43301804. Its totient is φ = 19985436.

The previous prime is 29978159. The next prime is 29978183. The reversal of 29978163 is 36187992.

It is not a de Polignac number, because 29978163 - 2² = 29978159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29978183) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1665445 + ... + 1665462.

Almost surely, 2^29978163 is an apocalyptic number.

29978163 is a deficient number, since it is larger than the sum of its proper divisors (13323641).

29978163 is a wasteful number, since it uses less digits than its factorization.

29978163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3330913 (or 3330910 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 29978163 is about 5475.2317759160. The cubic root of 29978163 is about 310.6478404774.

The spelling of 29978163 in words is "twenty-nine million, nine hundred seventy-eight thousand, one hundred sixty-three".