1399318405 has 8 divisors (see below), whose sum is σ = 1679760000. Its totient is φ = 1119069456.

The previous prime is 1399318391. The next prime is 1399318409. The reversal of 1399318405 is 5048139931.

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 1399318405 - 2⁵ = 1399318373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399318409) 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, 31665 + ... + 61654.

It is an arithmetic number, because the mean of its divisors is an integer number (209970000).

Almost surely, 2^1399318405 is an apocalyptic number.

It is an amenable number.

1399318405 is a deficient number, since it is larger than the sum of its proper divisors (280441595).

1399318405 is an equidigital number, since it uses as much as digits as its factorization.

1399318405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96323.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 1399318405 is about 37407.4645625709. The cubic root of 1399318405 is about 1118.5073667091.

The spelling of 1399318405 in words is "one billion, three hundred ninety-nine million, three hundred eighteen thousand, four hundred five".