999405479 has 2 divisors, whose sum is σ = 999405480. Its totient is φ = 999405478.

The previous prime is 999405461. The next prime is 999405487. The reversal of 999405479 is 974504999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999405479 is a prime.

It is a super-2 number, since 2×999405479² = 1997622622910438882, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999401479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499702739 + 499702740.

It is an arithmetic number, because the mean of its divisors is an integer number (499702740).

Almost surely, 2^999405479 is an apocalyptic number.

999405479 is a deficient number, since it is larger than the sum of its proper divisors (1).

999405479 is an equidigital number, since it uses as much as digits as its factorization.

999405479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3674160, while the sum is 56.

The square root of 999405479 is about 31613.3750017299. The cubic root of 999405479 is about 999.8017870476.

The spelling of 999405479 in words is "nine hundred ninety-nine million, four hundred five thousand, four hundred seventy-nine".