1398297609 has 12 divisors (see below), whose sum is σ = 2126066800. Its totient is φ = 883135224.

The previous prime is 1398297577. The next prime is 1398297613. The reversal of 1398297609 is 9067928931.

1398297609 is a `hidden beast` number, since 1 + 3 + 9 + 8 + 29 + 7 + 609 = 666.

It is not a de Polignac number, because 1398297609 - 2⁵ = 1398297577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1398297689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4088419 + ... + 4088760.

Almost surely, 2^1398297609 is an apocalyptic number.

1398297609 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1398297609 is a deficient number, since it is larger than the sum of its proper divisors (727769191).

1398297609 is a wasteful number, since it uses less digits than its factorization.

1398297609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8177204 (or 8177201 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 1398297609 is about 37393.8177911804. The cubic root of 1398297609 is about 1118.2353186433.

The spelling of 1398297609 in words is "one billion, three hundred ninety-eight million, two hundred ninety-seven thousand, six hundred nine".