312000019 has 2 divisors, whose sum is σ = 312000020. Its totient is φ = 312000018.

The previous prime is 311999999. The next prime is 312000023. The reversal of 312000019 is 910000213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312000019 - 2²⁷ = 177782291 is a prime.

It is a super-2 number, since 2×312000019² = 194688023712000722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311999966 and 312000011.

It is not a weakly prime, because it can be changed into another prime (312000049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156000009 + 156000010.

It is an arithmetic number, because the mean of its divisors is an integer number (156000010).

Almost surely, 2^312000019 is an apocalyptic number.

312000019 is a deficient number, since it is larger than the sum of its proper divisors (1).

312000019 is an equidigital number, since it uses as much as digits as its factorization.

312000019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 312000019 is about 17663.5222704873. The cubic root of 312000019 is about 678.2423023706.

The spelling of 312000019 in words is "three hundred twelve million, nineteen", and thus it is an aban number.