1312023619 has 2 divisors, whose sum is σ = 1312023620. Its totient is φ = 1312023618.

The previous prime is 1312023617. The next prime is 1312023653. The reversal of 1312023619 is 9163202131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312023619 - 2¹ = 1312023617 is a prime.

It is a super-2 number, since 2×1312023619² = 3442811953627714322, which contains 22 as substring.

Together with 1312023617, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1312023613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656011809 + 656011810.

It is an arithmetic number, because the mean of its divisors is an integer number (656011810).

Almost surely, 2^1312023619 is an apocalyptic number.

1312023619 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312023619 is an equidigital number, since it uses as much as digits as its factorization.

1312023619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1312023619 is about 36221.8665863591. The cubic root of 1312023619 is about 1094.7473041991.

The spelling of 1312023619 in words is "one billion, three hundred twelve million, twenty-three thousand, six hundred nineteen".