312030997 has 2 divisors, whose sum is σ = 312030998. Its totient is φ = 312030996.

The previous prime is 312030973. The next prime is 312031121. The reversal of 312030997 is 799030213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 296735076 + 15295921 = 17226^2 + 3911^2 .

It is an emirp because it is prime and its reverse (799030213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312030997 - 2¹¹ = 312028949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312030967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156015498 + 156015499.

It is an arithmetic number, because the mean of its divisors is an integer number (156015499).

Almost surely, 2^312030997 is an apocalyptic number.

It is an amenable number.

312030997 is a deficient number, since it is larger than the sum of its proper divisors (1).

312030997 is an equidigital number, since it uses as much as digits as its factorization.

312030997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 312030997 is about 17664.3991406444. The cubic root of 312030997 is about 678.2647488379.

The spelling of 312030997 in words is "three hundred twelve million, thirty thousand, nine hundred ninety-seven".