29181157 has 2 divisors, whose sum is σ = 29181158. Its totient is φ = 29181156.

The previous prime is 29181151. The next prime is 29181209. The reversal of 29181157 is 75118192.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27867841 + 1313316 = 5279^2 + 1146^2 .

It is a cyclic number.

It is not a de Polignac number, because 29181157 - 2³ = 29181149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29181151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14590578 + 14590579.

It is an arithmetic number, because the mean of its divisors is an integer number (14590579).

Almost surely, 2^29181157 is an apocalyptic number.

It is an amenable number.

29181157 is a deficient number, since it is larger than the sum of its proper divisors (1).

29181157 is an equidigital number, since it uses as much as digits as its factorization.

29181157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 34.

The square root of 29181157 is about 5401.9586262762. The cubic root of 29181157 is about 307.8700926549.

The spelling of 29181157 in words is "twenty-nine million, one hundred eighty-one thousand, one hundred fifty-seven".