1234131239987 has 2 divisors, whose sum is σ = 1234131239988. Its totient is φ = 1234131239986.

The previous prime is 1234131239963. The next prime is 1234131240019. The reversal of 1234131239987 is 7899321314321.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1234131239987 - 2¹⁸ = 1234130977843 is a prime.

It is not a weakly prime, because it can be changed into another prime (1234131239927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617065619993 + 617065619994.

It is an arithmetic number, because the mean of its divisors is an integer number (617065619994).

Almost surely, 2^{1234131239987} is an apocalyptic number.

1234131239987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1234131239987 is an equidigital number, since it uses as much as digits as its factorization.

1234131239987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 53.

The spelling of 1234131239987 in words is "one trillion, two hundred thirty-four billion, one hundred thirty-one million, two hundred thirty-nine thousand, nine hundred eighty-seven".