29693921 has 2 divisors, whose sum is σ = 29693922. Its totient is φ = 29693920.

The previous prime is 29693879. The next prime is 29693927. The reversal of 29693921 is 12939692.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28472896 + 1221025 = 5336^2 + 1105^2 .

It is a cyclic number.

It is not a de Polignac number, because 29693921 - 2⁶ = 29693857 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (29693927) 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, 14846960 + 14846961.

It is an arithmetic number, because the mean of its divisors is an integer number (14846961).

Almost surely, 2^29693921 is an apocalyptic number.

It is an amenable number.

29693921 is a deficient number, since it is larger than the sum of its proper divisors (1).

29693921 is an equidigital number, since it uses as much as digits as its factorization.

29693921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 41.

The square root of 29693921 is about 5449.2128789395. The cubic root of 29693921 is about 309.6629044719.

The spelling of 29693921 in words is "twenty-nine million, six hundred ninety-three thousand, nine hundred twenty-one".