312920654789 has 2 divisors, whose sum is σ = 312920654790. Its totient is φ = 312920654788.

The previous prime is 312920654771. The next prime is 312920654791. The reversal of 312920654789 is 987456029213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282354076900 + 30566577889 = 531370^2 + 174833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312920654789 is a prime.

Together with 312920654791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312920654989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156460327394 + 156460327395.

It is an arithmetic number, because the mean of its divisors is an integer number (156460327395).

It is a 2-persistent number, because it is pandigital, and so is 2⋅312920654789 = 625841309578, but 3⋅312920654789 = 938761964367 is not.

Almost surely, 2^312920654789 is an apocalyptic number.

It is an amenable number.

312920654789 is a deficient number, since it is larger than the sum of its proper divisors (1).

312920654789 is an equidigital number, since it uses as much as digits as its factorization.

312920654789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 312920654789 in words is "three hundred twelve billion, nine hundred twenty million, six hundred fifty-four thousand, seven hundred eighty-nine".