647312359 has 2 divisors, whose sum is σ = 647312360. Its totient is φ = 647312358.

The previous prime is 647312329. The next prime is 647312371. The reversal of 647312359 is 953213746.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 647312359 - 2⁷ = 647312231 is a prime.

It is a super-2 number, since 2×647312359² = 838026580228289762, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647312329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323656179 + 323656180.

It is an arithmetic number, because the mean of its divisors is an integer number (323656180).

Almost surely, 2^647312359 is an apocalyptic number.

647312359 is a deficient number, since it is larger than the sum of its proper divisors (1).

647312359 is an equidigital number, since it uses as much as digits as its factorization.

647312359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 40.

The square root of 647312359 is about 25442.3339927767. Note that the first 3 decimals coincide. The cubic root of 647312359 is about 865.0435381874.

The spelling of 647312359 in words is "six hundred forty-seven million, three hundred twelve thousand, three hundred fifty-nine".