720681827 has 2 divisors, whose sum is σ = 720681828. Its totient is φ = 720681826.

The previous prime is 720681803. The next prime is 720681847. The reversal of 720681827 is 728186027.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 720681827 - 2¹⁶ = 720616291 is a prime.

It is not a weakly prime, because it can be changed into another prime (720681847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360340913 + 360340914.

It is an arithmetic number, because the mean of its divisors is an integer number (360340914).

Almost surely, 2^720681827 is an apocalyptic number.

720681827 is a deficient number, since it is larger than the sum of its proper divisors (1).

720681827 is an equidigital number, since it uses as much as digits as its factorization.

720681827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 720681827 is about 26845.5178195542. The cubic root of 720681827 is about 896.5637806769.

The spelling of 720681827 in words is "seven hundred twenty million, six hundred eighty-one thousand, eight hundred twenty-seven".