49148639 has 4 divisors (see below), whose sum is σ = 49655424. Its totient is φ = 48641856.

The previous prime is 49148629. The next prime is 49148641. The reversal of 49148639 is 93684194.

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-49148639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 49148639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49148629) 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, 253247 + ... + 253440.

It is an arithmetic number, because the mean of its divisors is an integer number (12413856).

Almost surely, 2^49148639 is an apocalyptic number.

49148639 is a deficient number, since it is larger than the sum of its proper divisors (506785).

49148639 is an equidigital number, since it uses as much as digits as its factorization.

49148639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506784.

The product of its digits is 186624, while the sum is 44.

The square root of 49148639 is about 7010.6090320314. The cubic root of 49148639 is about 366.3002080679.

The spelling of 49148639 in words is "forty-nine million, one hundred forty-eight thousand, six hundred thirty-nine".