1002131239 has 2 divisors, whose sum is σ = 1002131240. Its totient is φ = 1002131238.

The previous prime is 1002131213. The next prime is 1002131329. The reversal of 1002131239 is 9321312001.

Together with next prime (1002131329) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1002131239 - 2⁷ = 1002131111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002101239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501065619 + 501065620.

It is an arithmetic number, because the mean of its divisors is an integer number (501065620).

Almost surely, 2^1002131239 is an apocalyptic number.

1002131239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002131239 is an equidigital number, since it uses as much as digits as its factorization.

1002131239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1002131239 is about 31656.4565136403. The cubic root of 1002131239 is about 1000.7099089101.

The spelling of 1002131239 in words is "one billion, two million, one hundred thirty-one thousand, two hundred thirty-nine".