49999913 has 8 divisors (see below), whose sum is σ = 51481032. Its totient is φ = 48525696.

The previous prime is 49999903. The next prime is 49999921. The reversal of 49999913 is 31999994.

It can be written as a sum of positive squares in 4 ways, for example, as 18550249 + 31449664 = 4307^2 + 5608^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 49999913 - 2⁴ = 49999897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (49999903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15431 + ... + 18387.

It is an arithmetic number, because the mean of its divisors is an integer number (6435129).

Almost surely, 2^49999913 is an apocalyptic number.

It is an amenable number.

49999913 is a deficient number, since it is larger than the sum of its proper divisors (1481119).

49999913 is a wasteful number, since it uses less digits than its factorization.

49999913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3451.

The product of its digits is 708588, while the sum is 53.

The square root of 49999913 is about 7071.0616600338. The cubic root of 49999913 is about 368.4029361901.

It can be divided in two parts, 4999991 and 3, that added together give a palindrome (4999994).

The spelling of 49999913 in words is "forty-nine million, nine hundred ninety-nine thousand, nine hundred thirteen".