1399244071 has 4 divisors (see below), whose sum is σ = 1418411872. Its totient is φ = 1380076272.

The previous prime is 1399244039. The next prime is 1399244101. The reversal of 1399244071 is 1704429931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1704429931 = 293 ⋅5817167.

It is a cyclic number.

It is not a de Polignac number, because 1399244071 - 2⁵ = 1399244039 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 (1399284071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9583791 + ... + 9583936.

It is an arithmetic number, because the mean of its divisors is an integer number (354602968).

Almost surely, 2^1399244071 is an apocalyptic number.

1399244071 is a deficient number, since it is larger than the sum of its proper divisors (19167801).

1399244071 is an equidigital number, since it uses as much as digits as its factorization.

1399244071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19167800.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 1399244071 is about 37406.4709776263. The cubic root of 1399244071 is about 1118.4875607334.

The spelling of 1399244071 in words is "one billion, three hundred ninety-nine million, two hundred forty-four thousand, seventy-one".