312500077 has 2 divisors, whose sum is σ = 312500078. Its totient is φ = 312500076.

The previous prime is 312500059. The next prime is 312500081. The reversal of 312500077 is 770005213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228795876 + 83704201 = 15126^2 + 9149^2 .

It is an emirp because it is prime and its reverse (770005213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312500077 - 2⁷ = 312499949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312500017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156250038 + 156250039.

It is an arithmetic number, because the mean of its divisors is an integer number (156250039).

Almost surely, 2^312500077 is an apocalyptic number.

It is an amenable number.

312500077 is a deficient number, since it is larger than the sum of its proper divisors (1).

312500077 is an equidigital number, since it uses as much as digits as its factorization.

312500077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 312500077 is about 17677.6717075524. The cubic root of 312500077 is about 678.6044598848.

The spelling of 312500077 in words is "three hundred twelve million, five hundred thousand, seventy-seven".