1230099979 has 2 divisors, whose sum is σ = 1230099980. Its totient is φ = 1230099978.

The previous prime is 1230099977. The next prime is 1230100021. The reversal of 1230099979 is 9799900321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1230099979 - 2¹ = 1230099977 is a prime.

Together with 1230099977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1230099973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615049989 + 615049990.

It is an arithmetic number, because the mean of its divisors is an integer number (615049990).

Almost surely, 2^1230099979 is an apocalyptic number.

1230099979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230099979 is an equidigital number, since it uses as much as digits as its factorization.

1230099979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 275562, while the sum is 49.

The square root of 1230099979 is about 35072.7811700184. The cubic root of 1230099979 is about 1071.4702991554.

The spelling of 1230099979 in words is "one billion, two hundred thirty million, ninety-nine thousand, nine hundred seventy-nine".