29479981 has 8 divisors (see below), whose sum is σ = 30198528. Its totient is φ = 28770000.

The previous prime is 29479973. The next prime is 29480027. The reversal of 29479981 is 18997492.

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 29479981 - 2³ = 29479973 is a prime.

It is a super-2 number, since 2×29479981² = 1738138559520722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29479181) 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, 5116 + ... + 9226.

It is an arithmetic number, because the mean of its divisors is an integer number (3774816).

Almost surely, 2^29479981 is an apocalyptic number.

It is an amenable number.

29479981 is a deficient number, since it is larger than the sum of its proper divisors (718547).

29479981 is a wasteful number, since it uses less digits than its factorization.

29479981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4283.

The product of its digits is 326592, while the sum is 49.

The square root of 29479981 is about 5429.5470345140. The cubic root of 29479981 is about 308.9174204955.

The spelling of 29479981 in words is "twenty-nine million, four hundred seventy-nine thousand, nine hundred eighty-one".