49970639 has 4 divisors (see below), whose sum is σ = 50330280. Its totient is φ = 49611000.

The previous prime is 49970629. The next prime is 49970647. The reversal of 49970639 is 93607994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93607994 = 2 ⋅46803997.

It is a cyclic number.

It is not a de Polignac number, because 49970639 - 2⁴ = 49970623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49970593 and 49970602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49970629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179612 + ... + 179889.

It is an arithmetic number, because the mean of its divisors is an integer number (12582570).

Almost surely, 2^49970639 is an apocalyptic number.

49970639 is a deficient number, since it is larger than the sum of its proper divisors (359641).

49970639 is a wasteful number, since it uses less digits than its factorization.

49970639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359640.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 49970639 is about 7068.9913707685. The cubic root of 49970639 is about 368.3310245118.

The spelling of 49970639 in words is "forty-nine million, nine hundred seventy thousand, six hundred thirty-nine".