1720418979 has 8 divisors (see below), whose sum is σ = 2296553472. Its totient is φ = 1145615240.

The previous prime is 1720418969. The next prime is 1720418981. The reversal of 1720418979 is 9798140271.

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

It is not a de Polignac number, because 1720418979 - 2¹⁵ = 1720386211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1720418969) 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, 329667 + ... + 334844.

It is an arithmetic number, because the mean of its divisors is an integer number (287069184).

Almost surely, 2^1720418979 is an apocalyptic number.

1720418979 is a deficient number, since it is larger than the sum of its proper divisors (576134493).

1720418979 is an equidigital number, since it uses as much as digits as its factorization.

1720418979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665377.

The product of its (nonzero) digits is 254016, while the sum is 48.

The square root of 1720418979 is about 41477.9336394667. The cubic root of 1720418979 is about 1198.2425614591.

The spelling of 1720418979 in words is "one billion, seven hundred twenty million, four hundred eighteen thousand, nine hundred seventy-nine".