312141391 has 2 divisors, whose sum is σ = 312141392. Its totient is φ = 312141390.

The previous prime is 312141377. The next prime is 312141461. The reversal of 312141391 is 193141213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 312141391 - 2⁹ = 312140879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312141371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156070695 + 156070696.

It is an arithmetic number, because the mean of its divisors is an integer number (156070696).

Almost surely, 2^312141391 is an apocalyptic number.

312141391 is a deficient number, since it is larger than the sum of its proper divisors (1).

312141391 is an equidigital number, since it uses as much as digits as its factorization.

312141391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 25.

The square root of 312141391 is about 17667.5236238699. The cubic root of 312141391 is about 678.3447275696.

The spelling of 312141391 in words is "three hundred twelve million, one hundred forty-one thousand, three hundred ninety-one".