49191945 has 24 divisors (see below), whose sum is σ = 86515968. Its totient is φ = 23849760.

The previous prime is 49191943. The next prime is 49191953. The reversal of 49191945 is 54919194.

It is a happy number.

49191945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 49191945 - 2¹ = 49191943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 49191897 and 49191906.

It is not an unprimeable number, because it can be changed into a prime (49191943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11737 + ... + 15366.

It is an arithmetic number, because the mean of its divisors is an integer number (3604832).

Almost surely, 2^49191945 is an apocalyptic number.

It is an amenable number.

49191945 is a deficient number, since it is larger than the sum of its proper divisors (37324023).

49191945 is a wasteful number, since it uses less digits than its factorization.

49191945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27133 (or 27122 counting only the distinct ones).

The product of its digits is 58320, while the sum is 42.

The square root of 49191945 is about 7013.6969566699. The cubic root of 49191945 is about 366.4077616735.

The spelling of 49191945 in words is "forty-nine million, one hundred ninety-one thousand, nine hundred forty-five".