505554939497 has 2 divisors, whose sum is σ = 505554939498. Its totient is φ = 505554939496.

The previous prime is 505554939469. The next prime is 505554939523. The reversal of 505554939497 is 794939455505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 332541368896 + 173013570601 = 576664^2 + 415949^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505554939497 is a prime.

It is a super-2 number, since 2×505554939497² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (505554939457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252777469748 + 252777469749.

It is an arithmetic number, because the mean of its divisors is an integer number (252777469749).

Almost surely, 2^505554939497 is an apocalyptic number.

It is an amenable number.

505554939497 is a deficient number, since it is larger than the sum of its proper divisors (1).

505554939497 is an equidigital number, since it uses as much as digits as its factorization.

505554939497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153090000, while the sum is 65.

The spelling of 505554939497 in words is "five hundred five billion, five hundred fifty-four million, nine hundred thirty-nine thousand, four hundred ninety-seven".