1379605657 has 8 divisors (see below), whose sum is σ = 1385379072. Its totient is φ = 1373845200.

The previous prime is 1379605651. The next prime is 1379605681. The reversal of 1379605657 is 7565069731.

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

It is not a de Polignac number, because 1379605657 - 2³ = 1379605649 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 1379605657.

It is not an unprimeable number, because it can be changed into a prime (1379605651) 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, 249432 + ... + 254902.

It is an arithmetic number, because the mean of its divisors is an integer number (173172384).

Almost surely, 2^1379605657 is an apocalyptic number.

It is an amenable number.

1379605657 is a deficient number, since it is larger than the sum of its proper divisors (5773415).

1379605657 is an equidigital number, since it uses as much as digits as its factorization.

1379605657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6479.

The product of its (nonzero) digits is 1190700, while the sum is 49.

The square root of 1379605657 is about 37143.0431844242. The cubic root of 1379605657 is about 1113.2302239859.

The spelling of 1379605657 in words is "one billion, three hundred seventy-nine million, six hundred five thousand, six hundred fifty-seven".