999621433 has 2 divisors, whose sum is σ = 999621434. Its totient is φ = 999621432.

The previous prime is 999621431. The next prime is 999621479. The reversal of 999621433 is 334126999.

999621433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (999621479) can be obtained adding 999621433 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 827827984 + 171793449 = 28772^2 + 13107^2 .

It is a cyclic number.

It is not a de Polignac number, because 999621433 - 2¹ = 999621431 is a prime.

Together with 999621431, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (999621431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499810716 + 499810717.

It is an arithmetic number, because the mean of its divisors is an integer number (499810717).

Almost surely, 2^999621433 is an apocalyptic number.

It is an amenable number.

999621433 is a deficient number, since it is larger than the sum of its proper divisors (1).

999621433 is an equidigital number, since it uses as much as digits as its factorization.

999621433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 46.

The square root of 999621433 is about 31616.7903652474. The cubic root of 999621433 is about 999.8737950730.

The spelling of 999621433 in words is "nine hundred ninety-nine million, six hundred twenty-one thousand, four hundred thirty-three".