505623247 has 2 divisors, whose sum is σ = 505623248. Its totient is φ = 505623246.

The previous prime is 505623221. The next prime is 505623253. The reversal of 505623247 is 742326505.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505623247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505623277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252811623 + 252811624.

It is an arithmetic number, because the mean of its divisors is an integer number (252811624).

Almost surely, 2^505623247 is an apocalyptic number.

505623247 is a deficient number, since it is larger than the sum of its proper divisors (1).

505623247 is an equidigital number, since it uses as much as digits as its factorization.

505623247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 34.

The square root of 505623247 is about 22486.0678421106. The cubic root of 505623247 is about 796.6648901026.

The spelling of 505623247 in words is "five hundred five million, six hundred twenty-three thousand, two hundred forty-seven".