1398422345 has 4 divisors (see below), whose sum is σ = 1678106820. Its totient is φ = 1118737872.

The previous prime is 1398422327. The next prime is 1398422387. The reversal of 1398422345 is 5432248931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5432248931 = 3067 ⋅1771193.

It can be written as a sum of positive squares in 2 ways, for example, as 399040576 + 999381769 = 19976^2 + 31613^2 .

It is a cyclic number.

It is not a de Polignac number, because 1398422345 - 2⁶ = 1398422281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139842230 + ... + 139842239.

It is an arithmetic number, because the mean of its divisors is an integer number (419526705).

Almost surely, 2^1398422345 is an apocalyptic number.

It is an amenable number.

1398422345 is a deficient number, since it is larger than the sum of its proper divisors (279684475).

1398422345 is an equidigital number, since it uses as much as digits as its factorization.

1398422345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279684474.

The product of its digits is 207360, while the sum is 41.

The square root of 1398422345 is about 37395.4856232674. The cubic root of 1398422345 is about 1118.2685686115.

The spelling of 1398422345 in words is "one billion, three hundred ninety-eight million, four hundred twenty-two thousand, three hundred forty-five".