29128493 has 2 divisors, whose sum is σ = 29128494. Its totient is φ = 29128492.

The previous prime is 29128487. The next prime is 29128507. The reversal of 29128493 is 39482192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25180324 + 3948169 = 5018^2 + 1987^2 .

It is a cyclic number.

It is not a de Polignac number, because 29128493 - 2⁸ = 29128237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29128433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14564246 + 14564247.

It is an arithmetic number, because the mean of its divisors is an integer number (14564247).

Almost surely, 2^29128493 is an apocalyptic number.

It is an amenable number.

29128493 is a deficient number, since it is larger than the sum of its proper divisors (1).

29128493 is an equidigital number, since it uses as much as digits as its factorization.

29128493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 38.

The square root of 29128493 is about 5397.0818967290. The cubic root of 29128493 is about 307.6847740479.

The spelling of 29128493 in words is "twenty-nine million, one hundred twenty-eight thousand, four hundred ninety-three".