219914478793 has 2 divisors, whose sum is σ = 219914478794. Its totient is φ = 219914478792.

The previous prime is 219914478779. The next prime is 219914478829. The reversal of 219914478793 is 397874419912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196287099849 + 23627378944 = 443043^2 + 153712^2 .

It is a cyclic number.

It is not a de Polignac number, because 219914478793 - 2²¹ = 219912381641 is a prime.

It is not a weakly prime, because it can be changed into another prime (219914478743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109957239396 + 109957239397.

It is an arithmetic number, because the mean of its divisors is an integer number (109957239397).

Almost surely, 2^219914478793 is an apocalyptic number.

It is an amenable number.

219914478793 is a deficient number, since it is larger than the sum of its proper divisors (1).

219914478793 is an equidigital number, since it uses as much as digits as its factorization.

219914478793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27433728, while the sum is 64.

The spelling of 219914478793 in words is "two hundred nineteen billion, nine hundred fourteen million, four hundred seventy-eight thousand, seven hundred ninety-three".