1398471391 has 8 divisors (see below), whose sum is σ = 1481330160. Its totient is φ = 1315678848.

The previous prime is 1398471353. The next prime is 1398471397. The reversal of 1398471391 is 1931748931.

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

It is a cyclic number.

It is not a de Polignac number, because 1398471391 - 2¹⁷ = 1398340319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398471397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30825 + ... + 61213.

It is an arithmetic number, because the mean of its divisors is an integer number (185166270).

Almost surely, 2^1398471391 is an apocalyptic number.

1398471391 is a deficient number, since it is larger than the sum of its proper divisors (82858769).

1398471391 is a wasteful number, since it uses less digits than its factorization.

1398471391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33113.

The product of its digits is 163296, while the sum is 46.

The square root of 1398471391 is about 37396.1413918602. The cubic root of 1398471391 is about 1118.2816419055.

The spelling of 1398471391 in words is "one billion, three hundred ninety-eight million, four hundred seventy-one thousand, three hundred ninety-one".