194488979 has 2 divisors, whose sum is σ = 194488980. Its totient is φ = 194488978.

The previous prime is 194488969. The next prime is 194488981. The reversal of 194488979 is 979884491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 194488979 - 2²⁴ = 177711763 is a prime.

It is a Sophie Germain prime.

Together with 194488981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (194488919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97244489 + 97244490.

It is an arithmetic number, because the mean of its divisors is an integer number (97244490).

Almost surely, 2^194488979 is an apocalyptic number.

194488979 is a deficient number, since it is larger than the sum of its proper divisors (1).

194488979 is an equidigital number, since it uses as much as digits as its factorization.

194488979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 59.

The square root of 194488979 is about 13945.9305533908. The cubic root of 194488979 is about 579.3820002863.

The spelling of 194488979 in words is "one hundred ninety-four million, four hundred eighty-eight thousand, nine hundred seventy-nine".