1399889197 has 4 divisors (see below), whose sum is σ = 1599873376. Its totient is φ = 1199905020.

The previous prime is 1399889177. The next prime is 1399889207. The reversal of 1399889197 is 7919889931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7919889931 = 1559 ⋅5080109.

It is a cyclic number.

It is not a de Polignac number, because 1399889197 - 2⁷ = 1399889069 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 (1399889147) 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, 99992079 + ... + 99992092.

It is an arithmetic number, because the mean of its divisors is an integer number (399968344).

Almost surely, 2^1399889197 is an apocalyptic number.

It is an amenable number.

1399889197 is a deficient number, since it is larger than the sum of its proper divisors (199984179).

1399889197 is an equidigital number, since it uses as much as digits as its factorization.

1399889197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199984178.

The product of its digits is 8817984, while the sum is 64.

The square root of 1399889197 is about 37415.0931710720. The cubic root of 1399889197 is about 1118.6594284240.

The spelling of 1399889197 in words is "one billion, three hundred ninety-nine million, eight hundred eighty-nine thousand, one hundred ninety-seven".