50605781 has 2 divisors, whose sum is σ = 50605782. Its totient is φ = 50605780.

The previous prime is 50605729. The next prime is 50605811. The reversal of 50605781 is 18750605.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36663025 + 13942756 = 6055^2 + 3734^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50605781 is a prime.

It is a super-2 number, since 2×50605781² = 5121890141239922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50605081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25302890 + 25302891.

It is an arithmetic number, because the mean of its divisors is an integer number (25302891).

Almost surely, 2^50605781 is an apocalyptic number.

It is an amenable number.

50605781 is a deficient number, since it is larger than the sum of its proper divisors (1).

50605781 is an equidigital number, since it uses as much as digits as its factorization.

50605781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 50605781 is about 7113.7740335212. The cubic root of 50605781 is about 369.8849922566.

The spelling of 50605781 in words is "fifty million, six hundred five thousand, seven hundred eighty-one".