312688487 has 2 divisors, whose sum is σ = 312688488. Its totient is φ = 312688486.

The previous prime is 312688433. The next prime is 312688507. The reversal of 312688487 is 784886213.

It is a strong prime.

It is an emirp because it is prime and its reverse (784886213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312688487 - 2⁸ = 312688231 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312688687) 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, 156344243 + 156344244.

It is an arithmetic number, because the mean of its divisors is an integer number (156344244).

Almost surely, 2^312688487 is an apocalyptic number.

312688487 is a deficient number, since it is larger than the sum of its proper divisors (1).

312688487 is an equidigital number, since it uses as much as digits as its factorization.

312688487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 516096, while the sum is 47.

The square root of 312688487 is about 17682.9999434485. Note that the first 4 decimals coincide. The cubic root of 312688487 is about 678.7408120428.

The spelling of 312688487 in words is "three hundred twelve million, six hundred eighty-eight thousand, four hundred eighty-seven".