720450019 has 2 divisors, whose sum is σ = 720450020. Its totient is φ = 720450018.

The previous prime is 720450011. The next prime is 720450061. The reversal of 720450019 is 910054027.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 720450019 - 2³ = 720450011 is a prime.

It is a super-2 number, since 2×720450019² = 1038096459754200722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (720450011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360225009 + 360225010.

It is an arithmetic number, because the mean of its divisors is an integer number (360225010).

Almost surely, 2^720450019 is an apocalyptic number.

720450019 is a deficient number, since it is larger than the sum of its proper divisors (1).

720450019 is an equidigital number, since it uses as much as digits as its factorization.

720450019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 720450019 is about 26841.2000290598. The cubic root of 720450019 is about 896.4676435023.

The spelling of 720450019 in words is "seven hundred twenty million, four hundred fifty thousand, nineteen".