29139437 has 2 divisors, whose sum is σ = 29139438. Its totient is φ = 29139436.

The previous prime is 29139373. The next prime is 29139443. The reversal of 29139437 is 73493192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19616041 + 9523396 = 4429^2 + 3086^2 .

It is a cyclic number.

It is not a de Polignac number, because 29139437 - 2⁶ = 29139373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 29139437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29139497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14569718 + 14569719.

It is an arithmetic number, because the mean of its divisors is an integer number (14569719).

Almost surely, 2^29139437 is an apocalyptic number.

It is an amenable number.

29139437 is a deficient number, since it is larger than the sum of its proper divisors (1).

29139437 is an equidigital number, since it uses as much as digits as its factorization.

29139437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 38.

The square root of 29139437 is about 5398.0956827385. The cubic root of 29139437 is about 307.7233031099.

The spelling of 29139437 in words is "twenty-nine million, one hundred thirty-nine thousand, four hundred thirty-seven".