29139811 has 2 divisors, whose sum is σ = 29139812. Its totient is φ = 29139810.

The previous prime is 29139793. The next prime is 29139823. The reversal of 29139811 is 11893192.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 29139811 - 2⁵ = 29139779 is a prime.

It is not a weakly prime, because it can be changed into another prime (29139511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14569905 + 14569906.

It is an arithmetic number, because the mean of its divisors is an integer number (14569906).

Almost surely, 2^29139811 is an apocalyptic number.

29139811 is a deficient number, since it is larger than the sum of its proper divisors (1).

29139811 is an equidigital number, since it uses as much as digits as its factorization.

29139811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 34.

The square root of 29139811 is about 5398.1303244735. The cubic root of 29139811 is about 307.7246196307.

The spelling of 29139811 in words is "twenty-nine million, one hundred thirty-nine thousand, eight hundred eleven".