312401393 has 2 divisors, whose sum is σ = 312401394. Its totient is φ = 312401392.

The previous prime is 312401371. The next prime is 312401423. The reversal of 312401393 is 393104213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287879089 + 24522304 = 16967^2 + 4952^2 .

It is a cyclic number.

It is not a de Polignac number, because 312401393 - 2⁶ = 312401329 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (312401093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156200696 + 156200697.

It is an arithmetic number, because the mean of its divisors is an integer number (156200697).

Almost surely, 2^312401393 is an apocalyptic number.

It is an amenable number.

312401393 is a deficient number, since it is larger than the sum of its proper divisors (1).

312401393 is an equidigital number, since it uses as much as digits as its factorization.

312401393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 312401393 is about 17674.8802824800. The cubic root of 312401393 is about 678.5330204859.

The spelling of 312401393 in words is "three hundred twelve million, four hundred one thousand, three hundred ninety-three".