50781817 has 2 divisors, whose sum is σ = 50781818. Its totient is φ = 50781816.

The previous prime is 50781811. The next prime is 50781823. The reversal of 50781817 is 71818705.

It is a balanced prime because it is at equal distance from previous prime (50781811) and next prime (50781823).

It can be written as a sum of positive squares in only one way, i.e., 49900096 + 881721 = 7064^2 + 939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50781817 is a prime.

It is not a weakly prime, because it can be changed into another prime (50781811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25390908 + 25390909.

It is an arithmetic number, because the mean of its divisors is an integer number (25390909).

Almost surely, 2^50781817 is an apocalyptic number.

It is an amenable number.

50781817 is a deficient number, since it is larger than the sum of its proper divisors (1).

50781817 is an equidigital number, since it uses as much as digits as its factorization.

50781817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 37.

The square root of 50781817 is about 7126.1361901103. The cubic root of 50781817 is about 370.3133867901.

The spelling of 50781817 in words is "fifty million, seven hundred eighty-one thousand, eight hundred seventeen".