312006641 has 2 divisors, whose sum is σ = 312006642. Its totient is φ = 312006640.

The previous prime is 312006637. The next prime is 312006649. The reversal of 312006641 is 146600213.

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., 205091041 + 106915600 = 14321^2 + 10340^2 .

It is a cyclic number.

It is not a de Polignac number, because 312006641 - 2² = 312006637 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (312006649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156003320 + 156003321.

It is an arithmetic number, because the mean of its divisors is an integer number (156003321).

Almost surely, 2^312006641 is an apocalyptic number.

It is an amenable number.

312006641 is a deficient number, since it is larger than the sum of its proper divisors (1).

312006641 is an equidigital number, since it uses as much as digits as its factorization.

312006641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 312006641 is about 17663.7097179500. The cubic root of 312006641 is about 678.2471007557.

Adding to 312006641 its reverse (146600213), we get a palindrome (458606854).

The spelling of 312006641 in words is "three hundred twelve million, six thousand, six hundred forty-one".