29439187457 has 2 divisors, whose sum is σ = 29439187458. Its totient is φ = 29439187456.

The previous prime is 29439187441. The next prime is 29439187469. The reversal of 29439187457 is 75478193492.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28001336896 + 1437850561 = 167336^2 + 37919^2 .

It is a cyclic number.

It is not a de Polignac number, because 29439187457 - 2⁴ = 29439187441 is a prime.

It is a super-2 number, since 2×29439187457² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 29439187396 and 29439187405.

It is not a weakly prime, because it can be changed into another prime (29439187357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14719593728 + 14719593729.

It is an arithmetic number, because the mean of its divisors is an integer number (14719593729).

Almost surely, 2^29439187457 is an apocalyptic number.

It is an amenable number.

29439187457 is a deficient number, since it is larger than the sum of its proper divisors (1).

29439187457 is an equidigital number, since it uses as much as digits as its factorization.

29439187457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15240960, while the sum is 59.

The spelling of 29439187457 in words is "twenty-nine billion, four hundred thirty-nine million, one hundred eighty-seven thousand, four hundred fifty-seven".