512720069 has 2 divisors, whose sum is σ = 512720070. Its totient is φ = 512720068.

The previous prime is 512720059. The next prime is 512720093. The reversal of 512720069 is 960027215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 414611044 + 98109025 = 20362^2 + 9905^2 .

It is a cyclic number.

It is not a de Polignac number, because 512720069 - 2⁴ = 512720053 is a prime.

It is a super-2 number, since 2×512720069² = 525763738310729522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (512720009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256360034 + 256360035.

It is an arithmetic number, because the mean of its divisors is an integer number (256360035).

Almost surely, 2^512720069 is an apocalyptic number.

It is an amenable number.

512720069 is a deficient number, since it is larger than the sum of its proper divisors (1).

512720069 is an equidigital number, since it uses as much as digits as its factorization.

512720069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 512720069 is about 22643.3228347785. The cubic root of 512720069 is about 800.3748602598.

The spelling of 512720069 in words is "five hundred twelve million, seven hundred twenty thousand, sixty-nine".