312198001 has 2 divisors, whose sum is σ = 312198002. Its totient is φ = 312198000.

The previous prime is 312197999. The next prime is 312198011. The reversal of 312198001 is 100891213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 290668401 + 21529600 = 17049^2 + 4640^2 .

It is a cyclic number.

It is not a de Polignac number, because 312198001 - 2¹ = 312197999 is a prime.

Together with 312197999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (312198011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156099000 + 156099001.

It is an arithmetic number, because the mean of its divisors is an integer number (156099001).

Almost surely, 2^312198001 is an apocalyptic number.

It is an amenable number.

312198001 is a deficient number, since it is larger than the sum of its proper divisors (1).

312198001 is an equidigital number, since it uses as much as digits as its factorization.

312198001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 312198001 is about 17669.1256433362. The cubic root of 312198001 is about 678.3857333178.

The spelling of 312198001 in words is "three hundred twelve million, one hundred ninety-eight thousand, one".