1398097905 has 8 divisors (see below), whose sum is σ = 2236956672. Its totient is φ = 745652208.

The previous prime is 1398097889. The next prime is 1398097931. The reversal of 1398097905 is 5097908931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1398097905 - 2⁴ = 1398097889 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46603249 + ... + 46603278.

It is an arithmetic number, because the mean of its divisors is an integer number (279619584).

Almost surely, 2^1398097905 is an apocalyptic number.

1398097905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1398097905 is a deficient number, since it is larger than the sum of its proper divisors (838858767).

1398097905 is an equidigital number, since it uses as much as digits as its factorization.

1398097905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93206535.

The product of its (nonzero) digits is 612360, while the sum is 51.

The square root of 1398097905 is about 37391.1474148628. The cubic root of 1398097905 is about 1118.1820808831.

The spelling of 1398097905 in words is "one billion, three hundred ninety-eight million, ninety-seven thousand, nine hundred five".