398889611587 has 2 divisors, whose sum is σ = 398889611588. Its totient is φ = 398889611586.

The previous prime is 398889611551. The next prime is 398889611599. The reversal of 398889611587 is 785116988893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398889611587 - 2¹¹ = 398889609539 is a prime.

It is a super-2 number, since 2×398889611587² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (398889611537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199444805793 + 199444805794.

It is an arithmetic number, because the mean of its divisors is an integer number (199444805794).

Almost surely, 2^398889611587 is an apocalyptic number.

398889611587 is a deficient number, since it is larger than the sum of its proper divisors (1).

398889611587 is an equidigital number, since it uses as much as digits as its factorization.

398889611587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209018880, while the sum is 73.

The spelling of 398889611587 in words is "three hundred ninety-eight billion, eight hundred eighty-nine million, six hundred eleven thousand, five hundred eighty-seven".