312019489 has 2 divisors, whose sum is σ = 312019490. Its totient is φ = 312019488.

The previous prime is 312019423. The next prime is 312019523. The reversal of 312019489 is 984910213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299117025 + 12902464 = 17295^2 + 3592^2 .

It is a cyclic number.

It is not a de Polignac number, because 312019489 - 2⁷ = 312019361 is a prime.

It is a super-2 number, since 2×312019489² = 194712323031642242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (312019289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156009744 + 156009745.

It is an arithmetic number, because the mean of its divisors is an integer number (156009745).

Almost surely, 2^312019489 is an apocalyptic number.

It is an amenable number.

312019489 is a deficient number, since it is larger than the sum of its proper divisors (1).

312019489 is an equidigital number, since it uses as much as digits as its factorization.

312019489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 312019489 is about 17664.0733977189. The cubic root of 312019489 is about 678.2564103857.

The spelling of 312019489 in words is "three hundred twelve million, nineteen thousand, four hundred eighty-nine".