29112981 has 16 divisors (see below), whose sum is σ = 39482304. Its totient is φ = 19079424.

The previous prime is 29112973. The next prime is 29112983. The reversal of 29112981 is 18921192.

It is not a de Polignac number, because 29112981 - 2³ = 29112973 is a prime.

It is a super-2 number, since 2×29112981² = 1695131325412722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29112983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52950 + ... + 53496.

It is an arithmetic number, because the mean of its divisors is an integer number (2467644).

Almost surely, 2^29112981 is an apocalyptic number.

It is an amenable number.

29112981 is a deficient number, since it is larger than the sum of its proper divisors (10369323).

29112981 is a wasteful number, since it uses less digits than its factorization.

29112981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820.

The product of its digits is 2592, while the sum is 33.

The square root of 29112981 is about 5395.6446324791. The cubic root of 29112981 is about 307.6301465085.

The spelling of 29112981 in words is "twenty-nine million, one hundred twelve thousand, nine hundred eighty-one".