29230981 has 4 divisors (see below), whose sum is σ = 31479532. Its totient is φ = 26982432.

The previous prime is 29230967. The next prime is 29230997. The reversal of 29230981 is 18903292.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2873025 + 26357956 = 1695^2 + 5134^2 .

It is a cyclic number.

It is not a de Polignac number, because 29230981 - 2²¹ = 27133829 is a prime.

It is a super-2 number, since 2×29230981² = 1708900500444722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29230951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1124256 + ... + 1124281.

It is an arithmetic number, because the mean of its divisors is an integer number (7869883).

Almost surely, 2^29230981 is an apocalyptic number.

It is an amenable number.

29230981 is a deficient number, since it is larger than the sum of its proper divisors (2248551).

29230981 is a wasteful number, since it uses less digits than its factorization.

29230981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2248550.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 29230981 is about 5406.5683201084. The cubic root of 29230981 is about 308.0452124835.

The spelling of 29230981 in words is "twenty-nine million, two hundred thirty thousand, nine hundred eighty-one".