49691945 has 4 divisors (see below), whose sum is σ = 59630340. Its totient is φ = 39753552.

The previous prime is 49691927. The next prime is 49691951. The reversal of 49691945 is 54919694.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10916416 + 38775529 = 3304^2 + 6227^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49691945 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 49691945.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4969190 + ... + 4969199.

It is an arithmetic number, because the mean of its divisors is an integer number (14907585).

Almost surely, 2^49691945 is an apocalyptic number.

It is an amenable number.

49691945 is a deficient number, since it is larger than the sum of its proper divisors (9938395).

49691945 is an equidigital number, since it uses as much as digits as its factorization.

49691945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9938394.

The product of its digits is 349920, while the sum is 47.

The square root of 49691945 is about 7049.2513786926. The cubic root of 49691945 is about 367.6450011668.

The spelling of 49691945 in words is "forty-nine million, six hundred ninety-one thousand, nine hundred forty-five".