1379751005 has 4 divisors (see below), whose sum is σ = 1655701212. Its totient is φ = 1103800800.

The previous prime is 1379750993. The next prime is 1379751013. The reversal of 1379751005 is 5001579731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 152720164 + 1227030841 = 12358^2 + 35029^2 .

It is not a de Polignac number, because 1379751005 - 2¹⁰ = 1379749981 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1379751005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137975096 + ... + 137975105.

It is an arithmetic number, because the mean of its divisors is an integer number (413925303).

Almost surely, 2^1379751005 is an apocalyptic number.

It is an amenable number.

1379751005 is a deficient number, since it is larger than the sum of its proper divisors (275950207).

1379751005 is an equidigital number, since it uses as much as digits as its factorization.

1379751005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275950206.

The product of its (nonzero) digits is 33075, while the sum is 38.

The square root of 1379751005 is about 37144.9997307848. Note that the first 3 decimals coincide. The cubic root of 1379751005 is about 1113.2693173079.

The spelling of 1379751005 in words is "one billion, three hundred seventy-nine million, seven hundred fifty-one thousand, five".