1399679993 has 8 divisors (see below), whose sum is σ = 1439026560. Its totient is φ = 1360413360.

The previous prime is 1399679987. The next prime is 1399679999. The reversal of 1399679993 is 3999769931.

It is an interprime number because it is at equal distance from previous prime (1399679987) and next prime (1399679999).

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 1399679993 - 2⁶ = 1399679929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1399679999) 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, 16448 + ... + 55406.

It is an arithmetic number, because the mean of its divisors is an integer number (179878320).

Almost surely, 2^1399679993 is an apocalyptic number.

It is an amenable number.

1399679993 is a deficient number, since it is larger than the sum of its proper divisors (39346567).

1399679993 is an equidigital number, since it uses as much as digits as its factorization.

1399679993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39967.

The product of its digits is 22320522, while the sum is 65.

The square root of 1399679993 is about 37412.2973499356. The cubic root of 1399679993 is about 1118.6037002786.

The spelling of 1399679993 in words is "one billion, three hundred ninety-nine million, six hundred seventy-nine thousand, nine hundred ninety-three".