1379953805 has 12 divisors (see below), whose sum is σ = 1660761180. Its totient is φ = 1100760192.

The previous prime is 1379953741. The next prime is 1379953823. The reversal of 1379953805 is 5083599731.

It can be written as a sum of positive squares in 2 ways, for example, as 459802249 + 920151556 = 21443^2 + 30334^2 .

It is not a de Polignac number, because 1379953805 - 2⁶ = 1379953741 is a prime.

It is a super-3 number, since 3×1379953805³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1367141 + ... + 1368149.

It is an arithmetic number, because the mean of its divisors is an integer number (138396765).

Almost surely, 2^1379953805 is an apocalyptic number.

It is an amenable number.

1379953805 is a deficient number, since it is larger than the sum of its proper divisors (280807375).

1379953805 is an frugal number, since it uses more digits than its factorization.

1379953805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060 (or 1537 counting only the distinct ones).

The product of its (nonzero) digits is 1020600, while the sum is 50.

The square root of 1379953805 is about 37147.7294730109. The cubic root of 1379953805 is about 1113.3238585395.

The spelling of 1379953805 in words is "one billion, three hundred seventy-nine million, nine hundred fifty-three thousand, eight hundred five".