49188739 has 6 divisors (see below), whose sum is σ = 51809820. Its totient is φ = 46570896.

The previous prime is 49188719. The next prime is 49188749. The reversal of 49188739 is 93788194.

It is a happy number.

It is not a de Polignac number, because 49188739 - 2⁵ = 49188707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 49188692 and 49188701.

It is not an unprimeable number, because it can be changed into a prime (49188709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29767 + ... + 31375.

It is an arithmetic number, because the mean of its divisors is an integer number (8634970).

Almost surely, 2^49188739 is an apocalyptic number.

49188739 is a deficient number, since it is larger than the sum of its proper divisors (2621081).

49188739 is an frugal number, since it uses more digits than its factorization.

49188739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3237 (or 1628 counting only the distinct ones).

The product of its digits is 435456, while the sum is 49.

The square root of 49188739 is about 7013.4684001569. The cubic root of 49188739 is about 366.3998015030.

The spelling of 49188739 in words is "forty-nine million, one hundred eighty-eight thousand, seven hundred thirty-nine".