1231300019 has 2 divisors, whose sum is σ = 1231300020. Its totient is φ = 1231300018.

The previous prime is 1231300003. The next prime is 1231300043. The reversal of 1231300019 is 9100031321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231300019 - 2⁴ = 1231300003 is a prime.

It is a super-2 number, since 2×1231300019² = 3032199473578800722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1231300099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615650009 + 615650010.

It is an arithmetic number, because the mean of its divisors is an integer number (615650010).

Almost surely, 2^1231300019 is an apocalyptic number.

1231300019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231300019 is an equidigital number, since it uses as much as digits as its factorization.

1231300019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 1231300019 is about 35089.8848530456. The cubic root of 1231300019 is about 1071.8186148310.

The spelling of 1231300019 in words is "one billion, two hundred thirty-one million, three hundred thousand, nineteen".