29065981 has 4 divisors (see below), whose sum is σ = 33218272. Its totient is φ = 24913692.

The previous prime is 29065957. The next prime is 29065987. The reversal of 29065981 is 18956092.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 29065981 - 2⁹ = 29065469 is a prime.

It is a super-2 number, since 2×29065981² = 1689662502984722, 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 (29065987) 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, 2076135 + ... + 2076148.

It is an arithmetic number, because the mean of its divisors is an integer number (8304568).

Almost surely, 2^29065981 is an apocalyptic number.

It is an amenable number.

29065981 is a deficient number, since it is larger than the sum of its proper divisors (4152291).

29065981 is an equidigital number, since it uses as much as digits as its factorization.

29065981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4152290.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 29065981 is about 5391.2875085642. The cubic root of 29065981 is about 307.4645112943.

The spelling of 29065981 in words is "twenty-nine million, sixty-five thousand, nine hundred eighty-one".