505050091 has 16 divisors (see below), whose sum is σ = 633334464. Its totient is φ = 392056704.

The previous prime is 505050079. The next prime is 505050113. The reversal of 505050091 is 190050505.

It is not a de Polignac number, because 505050091 - 2¹⁹ = 504525803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505054091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47536 + ... + 57181.

It is an arithmetic number, because the mean of its divisors is an integer number (39583404).

Almost surely, 2^505050091 is an apocalyptic number.

505050091 is a deficient number, since it is larger than the sum of its proper divisors (128284373).

505050091 is a wasteful number, since it uses less digits than its factorization.

505050091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104790.

The product of its (nonzero) digits is 1125, while the sum is 25.

The square root of 505050091 is about 22473.3195367307. The cubic root of 505050091 is about 796.3637529044.

The spelling of 505050091 in words is "five hundred five million, fifty thousand, ninety-one".