312121963 has 2 divisors, whose sum is σ = 312121964. Its totient is φ = 312121962.

The previous prime is 312121913. The next prime is 312121967. The reversal of 312121963 is 369121213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312121963 - 2⁹ = 312121451 is a prime.

It is not a weakly prime, because it can be changed into another prime (312121967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156060981 + 156060982.

It is an arithmetic number, because the mean of its divisors is an integer number (156060982).

Almost surely, 2^312121963 is an apocalyptic number.

312121963 is a deficient number, since it is larger than the sum of its proper divisors (1).

312121963 is an equidigital number, since it uses as much as digits as its factorization.

312121963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 28.

The square root of 312121963 is about 17666.9737929279. The cubic root of 312121963 is about 678.3306536540.

The spelling of 312121963 in words is "three hundred twelve million, one hundred twenty-one thousand, nine hundred sixty-three".