1345938639 has 8 divisors (see below), whose sum is σ = 1794883200. Its totient is φ = 897143256.

The previous prime is 1345938617. The next prime is 1345938653. The reversal of 1345938639 is 9368395431.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1345938639 - 2¹² = 1345934543 is a prime.

It is a super-3 number, since 3×1345938639³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1345938591 and 1345938600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345938239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14197 + ... + 53790.

It is an arithmetic number, because the mean of its divisors is an integer number (224360400).

Almost surely, 2^1345938639 is an apocalyptic number.

1345938639 is a deficient number, since it is larger than the sum of its proper divisors (448944561).

1345938639 is an equidigital number, since it uses as much as digits as its factorization.

1345938639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74589.

The product of its digits is 2099520, while the sum is 51.

The square root of 1345938639 is about 36687.0363888936. The cubic root of 1345938639 is about 1104.1000265453.

The spelling of 1345938639 in words is "one billion, three hundred forty-five million, nine hundred thirty-eight thousand, six hundred thirty-nine".