50777909 has 12 divisors (see below), whose sum is σ = 62840736. Its totient is φ = 40174992.

The previous prime is 50777897. The next prime is 50777911. The reversal of 50777909 is 90977705.

It is not a de Polignac number, because 50777909 - 2¹² = 50773813 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 50777909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50777939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20279 + ... + 22644.

It is an arithmetic number, because the mean of its divisors is an integer number (5236728).

Almost surely, 2^50777909 is an apocalyptic number.

It is an amenable number.

50777909 is a deficient number, since it is larger than the sum of its proper divisors (12062827).

50777909 is a wasteful number, since it uses less digits than its factorization.

50777909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42956 (or 42943 counting only the distinct ones).

The product of its (nonzero) digits is 138915, while the sum is 44.

The square root of 50777909 is about 7125.8619829463. The cubic root of 50777909 is about 370.3038871836.

The spelling of 50777909 in words is "fifty million, seven hundred seventy-seven thousand, nine hundred nine".