50781749 has 2 divisors, whose sum is σ = 50781750. Its totient is φ = 50781748.

The previous prime is 50781727. The next prime is 50781767. The reversal of 50781749 is 94718705.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42902500 + 7879249 = 6550^2 + 2807^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50781749 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50781719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25390874 + 25390875.

It is an arithmetic number, because the mean of its divisors is an integer number (25390875).

Almost surely, 2^50781749 is an apocalyptic number.

It is an amenable number.

50781749 is a deficient number, since it is larger than the sum of its proper divisors (1).

50781749 is an equidigital number, since it uses as much as digits as its factorization.

50781749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 50781749 is about 7126.1314189397. The cubic root of 50781749 is about 370.3132214992.

The spelling of 50781749 in words is "fifty million, seven hundred eighty-one thousand, seven hundred forty-nine".