49991993 has 2 divisors, whose sum is σ = 49991994. Its totient is φ = 49991992.

The previous prime is 49991927. The next prime is 49991999. The reversal of 49991993 is 39919994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41512249 + 8479744 = 6443^2 + 2912^2 .

It is a cyclic number.

It is not a de Polignac number, because 49991993 - 2²⁴ = 33214777 is a prime.

It is a super-2 number, since 2×49991993² = 4998398728224098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (49991999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24995996 + 24995997.

It is an arithmetic number, because the mean of its divisors is an integer number (24995997).

Almost surely, 2^49991993 is an apocalyptic number.

It is an amenable number.

49991993 is a deficient number, since it is larger than the sum of its proper divisors (1).

49991993 is an equidigital number, since it uses as much as digits as its factorization.

49991993 is an odious number, because the sum of its binary digits is odd.

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

The square root of 49991993 is about 7070.5016087969. The cubic root of 49991993 is about 368.3834834541.

The spelling of 49991993 in words is "forty-nine million, nine hundred ninety-one thousand, nine hundred ninety-three".