29919919 has 2 divisors, whose sum is σ = 29919920. Its totient is φ = 29919918.

The previous prime is 29919899. The next prime is 29919943. The reversal of 29919919 is 91991992.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 29919919 - 2¹³ = 29911727 is a prime.

It is a super-2 number, since 2×29919919² = 1790403105933122, 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 (29916919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14959959 + 14959960.

It is an arithmetic number, because the mean of its divisors is an integer number (14959960).

Almost surely, 2^29919919 is an apocalyptic number.

29919919 is a deficient number, since it is larger than the sum of its proper divisors (1).

29919919 is an equidigital number, since it uses as much as digits as its factorization.

29919919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 118098, while the sum is 49.

The square root of 29919919 is about 5469.9103283326. The cubic root of 29919919 is about 310.4465261269.

The spelling of 29919919 in words is "twenty-nine million, nine hundred nineteen thousand, nine hundred nineteen".