49943239 has 2 divisors, whose sum is σ = 49943240. Its totient is φ = 49943238.

The previous prime is 49943237. The next prime is 49943251. The reversal of 49943239 is 93234994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49943239 - 2¹ = 49943237 is a prime.

It is a super-2 number, since 2×49943239² = 4988654243622242, which contains 22 as substring.

Together with 49943237, it forms a pair of twin primes.

It is equal to p_2997934 and since 49943239 and 2997934 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 49943195 and 49943204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49943237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24971619 + 24971620.

It is an arithmetic number, because the mean of its divisors is an integer number (24971620).

Almost surely, 2^49943239 is an apocalyptic number.

49943239 is a deficient number, since it is larger than the sum of its proper divisors (1).

49943239 is an equidigital number, since it uses as much as digits as its factorization.

49943239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 43.

The square root of 49943239 is about 7067.0530633355. The cubic root of 49943239 is about 368.2636908706.

The spelling of 49943239 in words is "forty-nine million, nine hundred forty-three thousand, two hundred thirty-nine".