219430807 has 2 divisors, whose sum is σ = 219430808. Its totient is φ = 219430806.

The previous prime is 219430793. The next prime is 219430859. The reversal of 219430807 is 708034912.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-219430807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219430507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109715403 + 109715404.

It is an arithmetic number, because the mean of its divisors is an integer number (109715404).

Almost surely, 2^219430807 is an apocalyptic number.

219430807 is a deficient number, since it is larger than the sum of its proper divisors (1).

219430807 is an equidigital number, since it uses as much as digits as its factorization.

219430807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 219430807 is about 14813.1970553287. The cubic root of 219430807 is about 603.1600012511.

The spelling of 219430807 in words is "two hundred nineteen million, four hundred thirty thousand, eight hundred seven".