505172077 has 2 divisors, whose sum is σ = 505172078. Its totient is φ = 505172076.

The previous prime is 505172039. The next prime is 505172093. The reversal of 505172077 is 770271505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 428241636 + 76930441 = 20694^2 + 8771^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505172077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505172377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252586038 + 252586039.

It is an arithmetic number, because the mean of its divisors is an integer number (252586039).

Almost surely, 2^505172077 is an apocalyptic number.

It is an amenable number.

505172077 is a deficient number, since it is larger than the sum of its proper divisors (1).

505172077 is an equidigital number, since it uses as much as digits as its factorization.

505172077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17150, while the sum is 34.

The square root of 505172077 is about 22476.0333911480. The cubic root of 505172077 is about 796.4278636466.

The spelling of 505172077 in words is "five hundred five million, one hundred seventy-two thousand, seventy-seven".