1310231239 has 2 divisors, whose sum is σ = 1310231240. Its totient is φ = 1310231238.

The previous prime is 1310231201. The next prime is 1310231249. The reversal of 1310231239 is 9321320131.

It is a strong prime.

It is an emirp because it is prime and its reverse (9321320131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1310231239 - 2¹⁵ = 1310198471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1310231249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655115619 + 655115620.

It is an arithmetic number, because the mean of its divisors is an integer number (655115620).

Almost surely, 2^1310231239 is an apocalyptic number.

1310231239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1310231239 is an equidigital number, since it uses as much as digits as its factorization.

1310231239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 1310231239 is about 36197.1164459270. The cubic root of 1310231239 is about 1094.2485587605.

The spelling of 1310231239 in words is "one billion, three hundred ten million, two hundred thirty-one thousand, two hundred thirty-nine".