13434193987 has 2 divisors, whose sum is σ = 13434193988. Its totient is φ = 13434193986.

The previous prime is 13434193973. The next prime is 13434193991. The reversal of 13434193987 is 78939143431.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13434193987 is a prime.

It is not a weakly prime, because it can be changed into another prime (13434193937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6717096993 + 6717096994.

It is an arithmetic number, because the mean of its divisors is an integer number (6717096994).

Almost surely, 2^13434193987 is an apocalyptic number.

13434193987 is a deficient number, since it is larger than the sum of its proper divisors (1).

13434193987 is an equidigital number, since it uses as much as digits as its factorization.

13434193987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 52.

The spelling of 13434193987 in words is "thirteen billion, four hundred thirty-four million, one hundred ninety-three thousand, nine hundred eighty-seven".