1379808578 has 4 divisors (see below), whose sum is σ = 2069712870. Its totient is φ = 689904288.

The previous prime is 1379808569. The next prime is 1379808583. The reversal of 1379808578 is 8758089731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8758089731 = 7547 ⋅1160473.

It can be written as a sum of positive squares in only one way, i.e., 781370209 + 598438369 = 27953^2 + 24463^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344952143 + ... + 344952146.

Almost surely, 2^1379808578 is an apocalyptic number.

1379808578 is a deficient number, since it is larger than the sum of its proper divisors (689904292).

1379808578 is an equidigital number, since it uses as much as digits as its factorization.

1379808578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689904291.

The product of its (nonzero) digits is 3386880, while the sum is 56.

The square root of 1379808578 is about 37145.7746991498. The cubic root of 1379808578 is about 1113.2848015904.

The spelling of 1379808578 in words is "one billion, three hundred seventy-nine million, eight hundred eight thousand, five hundred seventy-eight".