511512997 has 2 divisors, whose sum is σ = 511512998. Its totient is φ = 511512996.

The previous prime is 511512979. The next prime is 511513001. The reversal of 511512997 is 799215115.

Together with previous prime (511512979) 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., 356983236 + 154529761 = 18894^2 + 12431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-511512997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (511512917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255756498 + 255756499.

It is an arithmetic number, because the mean of its divisors is an integer number (255756499).

Almost surely, 2^511512997 is an apocalyptic number.

It is an amenable number.

511512997 is a deficient number, since it is larger than the sum of its proper divisors (1).

511512997 is an equidigital number, since it uses as much as digits as its factorization.

511512997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28350, while the sum is 40.

The square root of 511512997 is about 22616.6530901458. The cubic root of 511512997 is about 799.7462721404.

The spelling of 511512997 in words is "five hundred eleven million, five hundred twelve thousand, nine hundred ninety-seven".