49139651 has 4 divisors (see below), whose sum is σ = 53606904. Its totient is φ = 44672400.

The previous prime is 49139641. The next prime is 49139683. The reversal of 49139651 is 15693194.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49139651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49139621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2233610 + ... + 2233631.

It is an arithmetic number, because the mean of its divisors is an integer number (13401726).

Almost surely, 2^49139651 is an apocalyptic number.

49139651 is a deficient number, since it is larger than the sum of its proper divisors (4467253).

49139651 is a wasteful number, since it uses less digits than its factorization.

49139651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4467252.

The product of its digits is 29160, while the sum is 38.

The square root of 49139651 is about 7009.9679742492. The cubic root of 49139651 is about 366.2778777989.

The spelling of 49139651 in words is "forty-nine million, one hundred thirty-nine thousand, six hundred fifty-one".