1979455250 has 16 divisors (see below), whose sum is σ = 3705540696. Its totient is φ = 791782000.

The previous prime is 1979455241. The next prime is 1979455271. The reversal of 1979455250 is 525549791.

It can be written as a sum of positive squares in 4 ways, for example, as 1066871569 + 912583681 = 32663^2 + 30209^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1979455195 and 1979455204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3958661 + ... + 3959160.

Almost surely, 2^1979455250 is an apocalyptic number.

1979455250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1979455250 is a deficient number, since it is larger than the sum of its proper divisors (1726085446).

1979455250 is an equidigital number, since it uses as much as digits as its factorization.

1979455250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7917838 (or 7917828 counting only the distinct ones).

The product of its (nonzero) digits is 567000, while the sum is 47.

The square root of 1979455250 is about 44491.0693285742. The cubic root of 1979455250 is about 1255.5920657349.

The spelling of 1979455250 in words is "one billion, nine hundred seventy-nine million, four hundred fifty-five thousand, two hundred fifty".