1312223377 has 2 divisors, whose sum is σ = 1312223378. Its totient is φ = 1312223376.

The previous prime is 1312223359. The next prime is 1312223447. The reversal of 1312223377 is 7733222131.

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., 763914321 + 548309056 = 27639^2 + 23416^2 .

It is an emirp because it is prime and its reverse (7733222131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1312223377 - 2⁷ = 1312223249 is a prime.

It is a super-2 number, since 2×1312223377² = 3443860382290568258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1312223317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656111688 + 656111689.

It is an arithmetic number, because the mean of its divisors is an integer number (656111689).

Almost surely, 2^1312223377 is an apocalyptic number.

It is an amenable number.

1312223377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312223377 is an equidigital number, since it uses as much as digits as its factorization.

1312223377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 31.

The square root of 1312223377 is about 36224.6239041898. The cubic root of 1312223377 is about 1094.8028604740.

The spelling of 1312223377 in words is "one billion, three hundred twelve million, two hundred twenty-three thousand, three hundred seventy-seven".