720499979 has 2 divisors, whose sum is σ = 720499980. Its totient is φ = 720499978.

The previous prime is 720499961. The next prime is 720499981. The reversal of 720499979 is 979994027.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 720499979 - 2¹² = 720495883 is a prime.

Together with 720499981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (720499079) by changing a digit.

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 as a sum of consecutive naturals, namely, 360249989 + 360249990.

It is an arithmetic number, because the mean of its divisors is an integer number (360249990).

Almost surely, 2^720499979 is an apocalyptic number.

720499979 is a deficient number, since it is larger than the sum of its proper divisors (1).

720499979 is an equidigital number, since it uses as much as digits as its factorization.

720499979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2571912, while the sum is 56.

The square root of 720499979 is about 26842.1306717630. The cubic root of 720499979 is about 896.4883650361.

It can be divided in two parts, 72049 and 9979, that added together give a palindrome (82028).

The spelling of 720499979 in words is "seven hundred twenty million, four hundred ninety-nine thousand, nine hundred seventy-nine".