29919521 has 2 divisors, whose sum is σ = 29919522. Its totient is φ = 29919520.

The previous prime is 29919517. The next prime is 29919551. The reversal of 29919521 is 12591992.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25361296 + 4558225 = 5036^2 + 2135^2 .

It is a cyclic number.

It is not a de Polignac number, because 29919521 - 2² = 29919517 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (29919551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14959760 + 14959761.

It is an arithmetic number, because the mean of its divisors is an integer number (14959761).

Almost surely, 2^29919521 is an apocalyptic number.

It is an amenable number.

29919521 is a deficient number, since it is larger than the sum of its proper divisors (1).

29919521 is an equidigital number, since it uses as much as digits as its factorization.

29919521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 38.

The square root of 29919521 is about 5469.8739473593. The cubic root of 29919521 is about 310.4451495828.

The spelling of 29919521 in words is "twenty-nine million, nine hundred nineteen thousand, five hundred twenty-one".