49787139 has 8 divisors (see below), whose sum is σ = 66418000. Its totient is φ = 33173856.

The previous prime is 49787131. The next prime is 49787183. The reversal of 49787139 is 93178794.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 49787139 - 2³ = 49787131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49787131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5229 + ... + 11265.

It is an arithmetic number, because the mean of its divisors is an integer number (8302250).

Almost surely, 2^49787139 is an apocalyptic number.

49787139 is a deficient number, since it is larger than the sum of its proper divisors (16630861).

49787139 is a wasteful number, since it uses less digits than its factorization.

49787139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8789.

The product of its digits is 381024, while the sum is 48.

The square root of 49787139 is about 7056.0002125850. Note that the first 3 decimals coincide. The cubic root of 49787139 is about 367.8796151396.

The spelling of 49787139 in words is "forty-nine million, seven hundred eighty-seven thousand, one hundred thirty-nine".