49839581 has 4 divisors (see below), whose sum is σ = 54370464. Its totient is φ = 45308700.

The previous prime is 49839577. The next prime is 49839583. The reversal of 49839581 is 18593894.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 49839581 - 2² = 49839577 is a prime.

It is a super-2 number, since 2×49839581² = 4967967668511122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49839583) 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, 2265425 + ... + 2265446.

It is an arithmetic number, because the mean of its divisors is an integer number (13592616).

Almost surely, 2^49839581 is an apocalyptic number.

It is an amenable number.

49839581 is a deficient number, since it is larger than the sum of its proper divisors (4530883).

49839581 is a wasteful number, since it uses less digits than its factorization.

49839581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4530882.

The product of its digits is 311040, while the sum is 47.

The square root of 49839581 is about 7059.7153625341. The cubic root of 49839581 is about 368.0087353196.

The spelling of 49839581 in words is "forty-nine million, eight hundred thirty-nine thousand, five hundred eighty-one".