48971139 has 16 divisors (see below), whose sum is σ = 76147200. Its totient is φ = 27982920.

The previous prime is 48971137. The next prime is 48971147. The reversal of 48971139 is 93117984.

It is a happy number.

It is not a de Polignac number, because 48971139 - 2¹ = 48971137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 48971139.

It is not an unprimeable number, because it can be changed into a prime (48971137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22767 + ... + 24824.

It is an arithmetic number, because the mean of its divisors is an integer number (4759200).

Almost surely, 2^48971139 is an apocalyptic number.

48971139 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

48971139 is a deficient number, since it is larger than the sum of its proper divisors (27176061).

48971139 is an equidigital number, since it uses as much as digits as its factorization.

48971139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47615 (or 47601 counting only the distinct ones).

The product of its digits is 54432, while the sum is 42.

The square root of 48971139 is about 6997.9381963547. The cubic root of 48971139 is about 365.8587125235.

The spelling of 48971139 in words is "forty-eight million, nine hundred seventy-one thousand, one hundred thirty-nine".