1312287619 has 2 divisors, whose sum is σ = 1312287620. Its totient is φ = 1312287618.

The previous prime is 1312287589. The next prime is 1312287623. The reversal of 1312287619 is 9167822131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1312287619 - 2¹³ = 1312279427 is a prime.

It is a super-2 number, since 2×1312287619² = 3444197589961378322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1312288619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656143809 + 656143810.

It is an arithmetic number, because the mean of its divisors is an integer number (656143810).

Almost surely, 2^1312287619 is an apocalyptic number.

1312287619 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312287619 is an equidigital number, since it uses as much as digits as its factorization.

1312287619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 40.

The square root of 1312287619 is about 36225.5106106180. The cubic root of 1312287619 is about 1094.8207261257.

The spelling of 1312287619 in words is "one billion, three hundred twelve million, two hundred eighty-seven thousand, six hundred nineteen".