1979132345 has 4 divisors (see below), whose sum is σ = 2374958820. Its totient is φ = 1583305872.

The previous prime is 1979132341. The next prime is 1979132377. The reversal of 1979132345 is 5432319791.

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 1545826489 + 433305856 = 39317^2 + 20816^2 .

It is a cyclic number.

It is not a de Polignac number, because 1979132345 - 2² = 1979132341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1979132296 and 1979132305.

It is not an unprimeable number, because it can be changed into a prime (1979132341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197913230 + ... + 197913239.

It is an arithmetic number, because the mean of its divisors is an integer number (593739705).

Almost surely, 2^1979132345 is an apocalyptic number.

It is an amenable number.

1979132345 is a deficient number, since it is larger than the sum of its proper divisors (395826475).

1979132345 is an equidigital number, since it uses as much as digits as its factorization.

1979132345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395826474.

The product of its digits is 204120, while the sum is 44.

The square root of 1979132345 is about 44487.4403062258. The cubic root of 1979132345 is about 1255.5237878583.

The spelling of 1979132345 in words is "one billion, nine hundred seventy-nine million, one hundred thirty-two thousand, three hundred forty-five".