1375505813 has 8 divisors (see below), whose sum is σ = 1506781056. Its totient is φ = 1245268800.

The previous prime is 1375505783. The next prime is 1375505851. The reversal of 1375505813 is 3185055731.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1375505813 - 2¹⁶ = 1375440277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375505213) 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 7 ways as a sum of consecutive naturals, for example, 256781 + ... + 262082.

It is an arithmetic number, because the mean of its divisors is an integer number (188347632).

Almost surely, 2^1375505813 is an apocalyptic number.

It is an amenable number.

1375505813 is a deficient number, since it is larger than the sum of its proper divisors (131275243).

1375505813 is a wasteful number, since it uses less digits than its factorization.

1375505813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519115.

The product of its (nonzero) digits is 63000, while the sum is 38.

The square root of 1375505813 is about 37087.8121894511. The cubic root of 1375505813 is about 1112.1263822702.

The spelling of 1375505813 in words is "one billion, three hundred seventy-five million, five hundred five thousand, eight hundred thirteen".