1398396587 has 4 divisors (see below), whose sum is σ = 1598167536. Its totient is φ = 1198625640.

The previous prime is 1398396529. The next prime is 1398396607. The reversal of 1398396587 is 7856938931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1398396587 - 2¹² = 1398392491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1398396187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99885464 + ... + 99885477.

It is an arithmetic number, because the mean of its divisors is an integer number (399541884).

Almost surely, 2^1398396587 is an apocalyptic number.

1398396587 is a deficient number, since it is larger than the sum of its proper divisors (199770949).

1398396587 is an equidigital number, since it uses as much as digits as its factorization.

1398396587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199770948.

The product of its digits is 9797760, while the sum is 59.

The square root of 1398396587 is about 37395.1412218219. The cubic root of 1398396587 is about 1118.2617026508.

The spelling of 1398396587 in words is "one billion, three hundred ninety-eight million, three hundred ninety-six thousand, five hundred eighty-seven".