17012621987 has 2 divisors, whose sum is σ = 17012621988. Its totient is φ = 17012621986.

The previous prime is 17012621911. The next prime is 17012622017. The reversal of 17012621987 is 78912621071.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 17012621987 - 2¹² = 17012617891 is a prime.

It is not a weakly prime, because it can be changed into another prime (17012621287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8506310993 + 8506310994.

It is an arithmetic number, because the mean of its divisors is an integer number (8506310994).

Almost surely, 2^17012621987 is an apocalyptic number.

17012621987 is a deficient number, since it is larger than the sum of its proper divisors (1).

17012621987 is an equidigital number, since it uses as much as digits as its factorization.

17012621987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 44.

The spelling of 17012621987 in words is "seventeen billion, twelve million, six hundred twenty-one thousand, nine hundred eighty-seven".