49971613 has 2 divisors, whose sum is σ = 49971614. Its totient is φ = 49971612.

The previous prime is 49971599. The next prime is 49971667. The reversal of 49971613 is 31617994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30935844 + 19035769 = 5562^2 + 4363^2 .

It is a cyclic number.

It is not a de Polignac number, because 49971613 - 2¹⁷ = 49840541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49971673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24985806 + 24985807.

It is an arithmetic number, because the mean of its divisors is an integer number (24985807).

Almost surely, 2^49971613 is an apocalyptic number.

It is an amenable number.

49971613 is a deficient number, since it is larger than the sum of its proper divisors (1).

49971613 is an equidigital number, since it uses as much as digits as its factorization.

49971613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 40.

The square root of 49971613 is about 7069.0602628638. The cubic root of 49971613 is about 368.3334175977. Note that the first 3 decimals are identical.

The spelling of 49971613 in words is "forty-nine million, nine hundred seventy-one thousand, six hundred thirteen".