49197939 has 16 divisors (see below), whose sum is σ = 76384512. Its totient is φ = 27582048.

The previous prime is 49197919. The next prime is 49197947. The reversal of 49197939 is 93979194.

It is not a de Polignac number, because 49197939 - 2¹¹ = 49195891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 49197891 and 49197900.

It is not an unprimeable number, because it can be changed into a prime (49197919) 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 15 ways as a sum of consecutive naturals, for example, 20989 + ... + 23214.

It is an arithmetic number, because the mean of its divisors is an integer number (4774032).

Almost surely, 2^49197939 is an apocalyptic number.

49197939 is a deficient number, since it is larger than the sum of its proper divisors (27186573).

49197939 is a wasteful number, since it uses less digits than its factorization.

49197939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44266.

The product of its digits is 551124, while the sum is 51.

The square root of 49197939 is about 7014.1242503965. The cubic root of 49197939 is about 366.4226432354.

The spelling of 49197939 in words is "forty-nine million, one hundred ninety-seven thousand, nine hundred thirty-nine".