1396649633 has 4 divisors (see below), whose sum is σ = 1396724400. Its totient is φ = 1396574868.

The previous prime is 1396649629. The next prime is 1396649641. The reversal of 1396649633 is 3369466931.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1396649633 - 2² = 1396649629 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1396649623) 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 3 ways as a sum of consecutive naturals, for example, 17318 + ... + 55616.

It is an arithmetic number, because the mean of its divisors is an integer number (349181100).

Almost surely, 2^1396649633 is an apocalyptic number.

It is an amenable number.

1396649633 is a deficient number, since it is larger than the sum of its proper divisors (74767).

1396649633 is an equidigital number, since it uses as much as digits as its factorization.

1396649633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74766.

The product of its digits is 1889568, while the sum is 50.

The square root of 1396649633 is about 37371.7758876936. The cubic root of 1396649633 is about 1117.7958439112.

The spelling of 1396649633 in words is "one billion, three hundred ninety-six million, six hundred forty-nine thousand, six hundred thirty-three".