720017279 has 2 divisors, whose sum is σ = 720017280. Its totient is φ = 720017278.

The previous prime is 720017261. The next prime is 720017339. The reversal of 720017279 is 972710027.

It is a weak prime.

It is an emirp because it is prime and its reverse (972710027) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 720017279 - 2²⁰ = 718968703 is a prime.

It is a super-3 number, since 3×720017279³ (a number of 28 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720017219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360008639 + 360008640.

It is an arithmetic number, because the mean of its divisors is an integer number (360008640).

Almost surely, 2^720017279 is an apocalyptic number.

720017279 is a deficient number, since it is larger than the sum of its proper divisors (1).

720017279 is an equidigital number, since it uses as much as digits as its factorization.

720017279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12348, while the sum is 35.

The square root of 720017279 is about 26833.1377032206. The cubic root of 720017279 is about 896.2881190867.

The spelling of 720017279 in words is "seven hundred twenty million, seventeen thousand, two hundred seventy-nine".