49066639 has 4 divisors (see below), whose sum is σ = 49086000. Its totient is φ = 49047280.

The previous prime is 49066621. The next prime is 49066643. The reversal of 49066639 is 93666094.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93666094 = 2 ⋅46833047.

It is a cyclic number.

It is not a de Polignac number, because 49066639 - 2¹⁷ = 48935567 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49066595 and 49066604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49066649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5182 + ... + 11179.

It is an arithmetic number, because the mean of its divisors is an integer number (12271500).

Almost surely, 2^49066639 is an apocalyptic number.

49066639 is a deficient number, since it is larger than the sum of its proper divisors (19361).

49066639 is a wasteful number, since it uses less digits than its factorization.

49066639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19360.

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

The square root of 49066639 is about 7004.7583113195. The cubic root of 49066639 is about 366.0963818947.

The spelling of 49066639 in words is "forty-nine million, sixty-six thousand, six hundred thirty-nine".