216460039 has 2 divisors, whose sum is σ = 216460040. Its totient is φ = 216460038.

The previous prime is 216460021. The next prime is 216460067. The reversal of 216460039 is 930064612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216460039 - 2⁷ = 216459911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216460019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108230019 + 108230020.

It is an arithmetic number, because the mean of its divisors is an integer number (108230020).

Almost surely, 2^216460039 is an apocalyptic number.

216460039 is a deficient number, since it is larger than the sum of its proper divisors (1).

216460039 is an equidigital number, since it uses as much as digits as its factorization.

216460039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 216460039 is about 14712.5809768375. The cubic root of 216460039 is about 600.4256599883.

The spelling of 216460039 in words is "two hundred sixteen million, four hundred sixty thousand, thirty-nine".