1399649841 has 16 divisors (see below), whose sum is σ = 2124131520. Its totient is φ = 910340640.

The previous prime is 1399649813. The next prime is 1399649857. The reversal of 1399649841 is 1489469931.

It is a happy number.

It is not a de Polignac number, because 1399649841 - 2⁶ = 1399649777 is a prime.

It is a super-2 number, since 2×1399649841² = 3918039354822650562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1399649891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 631075 + ... + 633288.

It is an arithmetic number, because the mean of its divisors is an integer number (132758220).

Almost surely, 2^1399649841 is an apocalyptic number.

It is an amenable number.

1399649841 is a deficient number, since it is larger than the sum of its proper divisors (724481679).

1399649841 is a wasteful number, since it uses less digits than its factorization.

1399649841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264413 (or 1264407 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 1399649841 is about 37411.8943786598. The cubic root of 1399649841 is about 1118.5956678757.

The spelling of 1399649841 in words is "one billion, three hundred ninety-nine million, six hundred forty-nine thousand, eight hundred forty-one".