29180981 has 2 divisors, whose sum is σ = 29180982. Its totient is φ = 29180980.

The previous prime is 29180969. The next prime is 29181011. The reversal of 29180981 is 18908192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29052100 + 128881 = 5390^2 + 359^2 .

It is a cyclic number.

It is not a de Polignac number, because 29180981 - 2¹⁰ = 29179957 is a prime.

It is a super-2 number, since 2×29180981² = 1703059304244722, which contains 22 as substring.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 29180981 parts by 7639 straight cuts.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29180681) 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 as a sum of consecutive naturals, namely, 14590490 + 14590491.

It is an arithmetic number, because the mean of its divisors is an integer number (14590491).

Almost surely, 2^29180981 is an apocalyptic number.

It is an amenable number.

29180981 is a deficient number, since it is larger than the sum of its proper divisors (1).

29180981 is an equidigital number, since it uses as much as digits as its factorization.

29180981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 29180981 is about 5401.9423358640. The cubic root of 29180981 is about 307.8694737025.

The spelling of 29180981 in words is "twenty-nine million, one hundred eighty thousand, nine hundred eighty-one".