312120427 has 2 divisors, whose sum is σ = 312120428. Its totient is φ = 312120426.

The previous prime is 312120397. The next prime is 312120433. The reversal of 312120427 is 724021213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312120427 - 2¹¹ = 312118379 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312120398 and 312120407.

It is not a weakly prime, because it can be changed into another prime (312120437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156060213 + 156060214.

It is an arithmetic number, because the mean of its divisors is an integer number (156060214).

Almost surely, 2^312120427 is an apocalyptic number.

312120427 is a deficient number, since it is larger than the sum of its proper divisors (1).

312120427 is an equidigital number, since it uses as much as digits as its factorization.

312120427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 312120427 is about 17666.9303219320. The cubic root of 312120427 is about 678.3295409292.

The spelling of 312120427 in words is "three hundred twelve million, one hundred twenty thousand, four hundred twenty-seven".