50639429 has 2 divisors, whose sum is σ = 50639430. Its totient is φ = 50639428.

The previous prime is 50639417. The next prime is 50639431. The reversal of 50639429 is 92493605.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50481025 + 158404 = 7105^2 + 398^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50639429 is a prime.

Together with 50639431, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 50639392 and 50639401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50639929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25319714 + 25319715.

It is an arithmetic number, because the mean of its divisors is an integer number (25319715).

Almost surely, 2^50639429 is an apocalyptic number.

It is an amenable number.

50639429 is a deficient number, since it is larger than the sum of its proper divisors (1).

50639429 is an equidigital number, since it uses as much as digits as its factorization.

50639429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 50639429 is about 7116.1386299032. The cubic root of 50639429 is about 369.9669534644.

The spelling of 50639429 in words is "fifty million, six hundred thirty-nine thousand, four hundred twenty-nine".