1398959726587 has 2 divisors, whose sum is σ = 1398959726588. Its totient is φ = 1398959726586.

The previous prime is 1398959726539. The next prime is 1398959726621. The reversal of 1398959726587 is 7856279598931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1398959726587 - 2¹⁹ = 1398959202299 is a prime.

It is a super-2 number, since 2×1398959726587² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1398959726287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699479863293 + 699479863294.

It is an arithmetic number, because the mean of its divisors is an integer number (699479863294).

Almost surely, 2^{1398959726587} is an apocalyptic number.

1398959726587 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398959726587 is an equidigital number, since it uses as much as digits as its factorization.

1398959726587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2057529600, while the sum is 79.

The spelling of 1398959726587 in words is "one trillion, three hundred ninety-eight billion, nine hundred fifty-nine million, seven hundred twenty-six thousand, five hundred eighty-seven".