1338625693 has 4 divisors (see below), whose sum is σ = 1357479648. Its totient is φ = 1319771740.

The previous prime is 1338625667. The next prime is 1338625697. The reversal of 1338625693 is 3965268331.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1338625693 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 (1338625697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9426871 + ... + 9427012.

It is an arithmetic number, because the mean of its divisors is an integer number (339369912).

Almost surely, 2^1338625693 is an apocalyptic number.

It is an amenable number.

1338625693 is a deficient number, since it is larger than the sum of its proper divisors (18853955).

1338625693 is an equidigital number, since it uses as much as digits as its factorization.

1338625693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18853954.

The product of its digits is 699840, while the sum is 46.

The square root of 1338625693 is about 36587.2340167988. The cubic root of 1338625693 is about 1102.0967426704.

The spelling of 1338625693 in words is "one billion, three hundred thirty-eight million, six hundred twenty-five thousand, six hundred ninety-three".