29168639 has 2 divisors, whose sum is σ = 29168640. Its totient is φ = 29168638.

The previous prime is 29168627. The next prime is 29168641. The reversal of 29168639 is 93686192.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 29168639 - 2¹² = 29164543 is a prime.

It is a super-2 number, since 2×29168639² = 1701619002224642, which contains 22 as substring.

Together with 29168641, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 29168639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29168609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14584319 + 14584320.

It is an arithmetic number, because the mean of its divisors is an integer number (14584320).

Almost surely, 2^29168639 is an apocalyptic number.

29168639 is a deficient number, since it is larger than the sum of its proper divisors (1).

29168639 is an equidigital number, since it uses as much as digits as its factorization.

29168639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 44.

The square root of 29168639 is about 5400.7998481706. The cubic root of 29168639 is about 307.8260634545.

The spelling of 29168639 in words is "twenty-nine million, one hundred sixty-eight thousand, six hundred thirty-nine".