216430079 has 2 divisors, whose sum is σ = 216430080. Its totient is φ = 216430078.

The previous prime is 216430061. The next prime is 216430087. The reversal of 216430079 is 970034612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216430079 - 2⁸ = 216429823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216430579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108215039 + 108215040.

It is an arithmetic number, because the mean of its divisors is an integer number (108215040).

Almost surely, 2^216430079 is an apocalyptic number.

216430079 is a deficient number, since it is larger than the sum of its proper divisors (1).

216430079 is an equidigital number, since it uses as much as digits as its factorization.

216430079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 216430079 is about 14711.5627653897. The cubic root of 216430079 is about 600.3979572879.

The spelling of 216430079 in words is "two hundred sixteen million, four hundred thirty thousand, seventy-nine".