29669921 has 2 divisors, whose sum is σ = 29669922. Its totient is φ = 29669920.

The previous prime is 29669903. The next prime is 29669933. The reversal of 29669921 is 12996692.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25000000 + 4669921 = 5000^2 + 2161^2 .

It is a cyclic number.

It is not a de Polignac number, because 29669921 - 2²² = 25475617 is a prime.

It is not a weakly prime, because it can be changed into another prime (29669971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14834960 + 14834961.

It is an arithmetic number, because the mean of its divisors is an integer number (14834961).

Almost surely, 2^29669921 is an apocalyptic number.

It is an amenable number.

29669921 is a deficient number, since it is larger than the sum of its proper divisors (1).

29669921 is an equidigital number, since it uses as much as digits as its factorization.

29669921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 44.

The square root of 29669921 is about 5447.0102808789. The cubic root of 29669921 is about 309.5794540256.

The spelling of 29669921 in words is "twenty-nine million, six hundred sixty-nine thousand, nine hundred twenty-one".