1312212973 has 2 divisors, whose sum is σ = 1312212974. Its totient is φ = 1312212972.

The previous prime is 1312212953. The next prime is 1312212977. The reversal of 1312212973 is 3792122131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 988284969 + 323928004 = 31437^2 + 17998^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312212973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312212977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656106486 + 656106487.

It is an arithmetic number, because the mean of its divisors is an integer number (656106487).

Almost surely, 2^1312212973 is an apocalyptic number.

It is an amenable number.

1312212973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312212973 is an equidigital number, since it uses as much as digits as its factorization.

1312212973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 31.

The square root of 1312212973 is about 36224.4802999298. The cubic root of 1312212973 is about 1094.7999670746.

The spelling of 1312212973 in words is "one billion, three hundred twelve million, two hundred twelve thousand, nine hundred seventy-three".