1398593217 has 16 divisors (see below), whose sum is σ = 2131713920. Its totient is φ = 798999552.

The previous prime is 1398593197. The next prime is 1398593219. The reversal of 1398593217 is 7123958931.

It is not a de Polignac number, because 1398593217 - 2¹⁹ = 1398068929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1398593219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152823 + ... + 161715.

It is an arithmetic number, because the mean of its divisors is an integer number (133232120).

Almost surely, 2^1398593217 is an apocalyptic number.

It is an amenable number.

1398593217 is a deficient number, since it is larger than the sum of its proper divisors (733120703).

1398593217 is an equidigital number, since it uses as much as digits as its factorization.

1398593217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16392.

The product of its digits is 408240, while the sum is 48.

The square root of 1398593217 is about 37397.7702142788. The cubic root of 1398593217 is about 1118.3141135085.

The spelling of 1398593217 in words is "one billion, three hundred ninety-eight million, five hundred ninety-three thousand, two hundred seventeen".