1379732805 has 32 divisors (see below), whose sum is σ = 2675848320. Its totient is φ = 668960640.

The previous prime is 1379732771. The next prime is 1379732807. The reversal of 1379732805 is 5082379731.

It is a happy number.

It is not a de Polignac number, because 1379732805 - 2⁷ = 1379732677 is a prime.

It is a super-2 number, since 2×1379732805² = 3807325226386336050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1379732807) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 463072 + ... + 466041.

It is an arithmetic number, because the mean of its divisors is an integer number (83620260).

Almost surely, 2^1379732805 is an apocalyptic number.

1379732805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1379732805 is a deficient number, since it is larger than the sum of its proper divisors (1296115515).

1379732805 is a wasteful number, since it uses less digits than its factorization.

1379732805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929138 (or 929132 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 1379732805 is about 37144.7547441089. The cubic root of 1379732805 is about 1113.2644223207.

The spelling of 1379732805 in words is "one billion, three hundred seventy-nine million, seven hundred thirty-two thousand, eight hundred five".