505655279 has 2 divisors, whose sum is σ = 505655280. Its totient is φ = 505655278.

The previous prime is 505655273. The next prime is 505655309. The reversal of 505655279 is 972556505.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505655279 is a prime.

It is a super-2 number, since 2×505655279² = 511374522361135682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505655273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252827639 + 252827640.

It is an arithmetic number, because the mean of its divisors is an integer number (252827640).

Almost surely, 2^505655279 is an apocalyptic number.

505655279 is a deficient number, since it is larger than the sum of its proper divisors (1).

505655279 is an equidigital number, since it uses as much as digits as its factorization.

505655279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472500, while the sum is 44.

The square root of 505655279 is about 22486.7800940908. The cubic root of 505655279 is about 796.6817130573.

The spelling of 505655279 in words is "five hundred five million, six hundred fifty-five thousand, two hundred seventy-nine".