720061819 has 2 divisors, whose sum is σ = 720061820. Its totient is φ = 720061818.

The previous prime is 720061813. The next prime is 720061841. The reversal of 720061819 is 918160027.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 720061819 - 2⁷ = 720061691 is a prime.

It is a super-2 number, since 2×720061819² = 1036978046363177522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (720061813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360030909 + 360030910.

It is an arithmetic number, because the mean of its divisors is an integer number (360030910).

Almost surely, 2^720061819 is an apocalyptic number.

720061819 is a deficient number, since it is larger than the sum of its proper divisors (1).

720061819 is an equidigital number, since it uses as much as digits as its factorization.

720061819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 720061819 is about 26833.9676343250. The cubic root of 720061819 is about 896.3066000551.

The spelling of 720061819 in words is "seven hundred twenty million, sixty-one thousand, eight hundred nineteen".