9999999479 has 2 divisors, whose sum is σ = 9999999480. Its totient is φ = 9999999478.

The previous prime is 9999999379. The next prime is 9999999491. The reversal of 9999999479 is 9749999999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9999999479 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9999999397 and 9999999406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999999379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999999739 + 4999999740.

It is an arithmetic number, because the mean of its divisors is an integer number (4999999740).

Almost surely, 2^9999999479 is an apocalyptic number.

9999999479 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999999479 is an equidigital number, since it uses as much as digits as its factorization.

9999999479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1205308188, while the sum is 83.

The square root of 9999999479 is about 99999.9973950000. The cubic root of 9999999479 is about 2154.4346526165.

The spelling of 9999999479 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, four hundred seventy-nine".