1309031023 has 2 divisors, whose sum is σ = 1309031024. Its totient is φ = 1309031022.

The previous prime is 1309031021. The next prime is 1309031063. The reversal of 1309031023 is 3201309031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1309031023 - 2¹ = 1309031021 is a prime.

Together with 1309031021, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1309030985 and 1309031003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1309031021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 654515511 + 654515512.

It is an arithmetic number, because the mean of its divisors is an integer number (654515512).

Almost surely, 2^1309031023 is an apocalyptic number.

1309031023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1309031023 is an equidigital number, since it uses as much as digits as its factorization.

1309031023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 1309031023 is about 36180.5337578096. The cubic root of 1309031023 is about 1093.9143338255.

The spelling of 1309031023 in words is "one billion, three hundred nine million, thirty-one thousand, twenty-three".