1399717918 has 8 divisors (see below), whose sum is σ = 2156322312. Its totient is φ = 680943816.

The previous prime is 1399717889. The next prime is 1399717919. The reversal of 1399717918 is 8197179931.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399717919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9457480 + ... + 9457627.

It is an arithmetic number, because the mean of its divisors is an integer number (269540289).

Almost surely, 2^1399717918 is an apocalyptic number.

1399717918 is a deficient number, since it is larger than the sum of its proper divisors (756604394).

1399717918 is a wasteful number, since it uses less digits than its factorization.

1399717918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18915146.

The product of its digits is 857304, while the sum is 55.

The square root of 1399717918 is about 37412.8041985628. The cubic root of 1399717918 is about 1118.6138032218.

The spelling of 1399717918 in words is "one billion, three hundred ninety-nine million, seven hundred seventeen thousand, nine hundred eighteen".