49966613 has 4 divisors (see below), whose sum is σ = 51317100. Its totient is φ = 48616128.

The previous prime is 49966573. The next prime is 49966627. The reversal of 49966613 is 31666994.

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 29833444 + 20133169 = 5462^2 + 4487^2 .

It is a cyclic number.

It is not a de Polignac number, because 49966613 - 2¹⁸ = 49704469 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49966633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675188 + ... + 675261.

It is an arithmetic number, because the mean of its divisors is an integer number (12829275).

Almost surely, 2^49966613 is an apocalyptic number.

It is an amenable number.

49966613 is a deficient number, since it is larger than the sum of its proper divisors (1350487).

49966613 is a wasteful number, since it uses less digits than its factorization.

49966613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350486.

The product of its digits is 209952, while the sum is 44.

The square root of 49966613 is about 7068.7066002204. The cubic root of 49966613 is about 368.3211324328.

The spelling of 49966613 in words is "forty-nine million, nine hundred sixty-six thousand, six hundred thirteen".