721850827 has 2 divisors, whose sum is σ = 721850828. Its totient is φ = 721850826.

The previous prime is 721850813. The next prime is 721850839. The reversal of 721850827 is 728058127.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 721850827 - 2¹⁵ = 721818059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 721850827.

It is not a weakly prime, because it can be changed into another prime (721850867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360925413 + 360925414.

It is an arithmetic number, because the mean of its divisors is an integer number (360925414).

Almost surely, 2^721850827 is an apocalyptic number.

721850827 is a deficient number, since it is larger than the sum of its proper divisors (1).

721850827 is an equidigital number, since it uses as much as digits as its factorization.

721850827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 721850827 is about 26867.2817195934. The cubic root of 721850827 is about 897.0482833800.

The spelling of 721850827 in words is "seven hundred twenty-one million, eight hundred fifty thousand, eight hundred twenty-seven".