29136881 has 2 divisors, whose sum is σ = 29136882. Its totient is φ = 29136880.

The previous prime is 29136847. The next prime is 29136907. The reversal of 29136881 is 18863192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26946481 + 2190400 = 5191^2 + 1480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29136881 is a prime.

It is a super-2 number, since 2×29136881² = 1697915668816322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29186881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14568440 + 14568441.

It is an arithmetic number, because the mean of its divisors is an integer number (14568441).

Almost surely, 2^29136881 is an apocalyptic number.

It is an amenable number.

29136881 is a deficient number, since it is larger than the sum of its proper divisors (1).

29136881 is an equidigital number, since it uses as much as digits as its factorization.

29136881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 29136881 is about 5397.8589273896. The cubic root of 29136881 is about 307.7143054097.

The spelling of 29136881 in words is "twenty-nine million, one hundred thirty-six thousand, eight hundred eighty-one".