29157881 has 2 divisors, whose sum is σ = 29157882. Its totient is φ = 29157880.

The previous prime is 29157871. The next prime is 29157889. The reversal of 29157881 is 18875192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18627856 + 10530025 = 4316^2 + 3245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29157881 is a prime.

It is a super-2 number, since 2×29157881² = 1700364048820322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (29157889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14578940 + 14578941.

It is an arithmetic number, because the mean of its divisors is an integer number (14578941).

Almost surely, 2^29157881 is an apocalyptic number.

It is an amenable number.

29157881 is a deficient number, since it is larger than the sum of its proper divisors (1).

29157881 is an equidigital number, since it uses as much as digits as its factorization.

29157881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 41.

The square root of 29157881 is about 5399.8037927317. The cubic root of 29157881 is about 307.7882145853.

The spelling of 29157881 in words is "twenty-nine million, one hundred fifty-seven thousand, eight hundred eighty-one".