506918197 has 2 divisors, whose sum is σ = 506918198. Its totient is φ = 506918196.

The previous prime is 506918179. The next prime is 506918207. The reversal of 506918197 is 791819605.

It is a happy number.

Together with previous prime (506918179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 506520036 + 398161 = 22506^2 + 631^2 .

It is a cyclic number.

It is not a de Polignac number, because 506918197 - 2²³ = 498529589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506918177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253459098 + 253459099.

It is an arithmetic number, because the mean of its divisors is an integer number (253459099).

Almost surely, 2^506918197 is an apocalyptic number.

It is an amenable number.

506918197 is a deficient number, since it is larger than the sum of its proper divisors (1).

506918197 is an equidigital number, since it uses as much as digits as its factorization.

506918197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 46.

The square root of 506918197 is about 22514.8439257304. The cubic root of 506918197 is about 797.3444222415.

The spelling of 506918197 in words is "five hundred six million, nine hundred eighteen thousand, one hundred ninety-seven".