29749021 has 2 divisors, whose sum is σ = 29749022. Its totient is φ = 29749020.

The previous prime is 29749019. The next prime is 29749037. The reversal of 29749021 is 12094792.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25704900 + 4044121 = 5070^2 + 2011^2 .

It is a cyclic number.

It is not a de Polignac number, because 29749021 - 2¹ = 29749019 is a prime.

Together with 29749019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29749081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14874510 + 14874511.

It is an arithmetic number, because the mean of its divisors is an integer number (14874511).

Almost surely, 2^29749021 is an apocalyptic number.

It is an amenable number.

29749021 is a deficient number, since it is larger than the sum of its proper divisors (1).

29749021 is an equidigital number, since it uses as much as digits as its factorization.

29749021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 29749021 is about 5454.2663117967. The cubic root of 29749021 is about 309.8543228123.

The spelling of 29749021 in words is "twenty-nine million, seven hundred forty-nine thousand, twenty-one".