29945309 has 4 divisors (see below), whose sum is σ = 30016860. Its totient is φ = 29873760.

The previous prime is 29945299. The next prime is 29945359. The reversal of 29945309 is 90354992.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2088025 + 27857284 = 1445^2 + 5278^2 .

It is a cyclic number.

It is not a de Polignac number, because 29945309 - 2²⁰ = 28896733 is a prime.

It is a super-2 number, since 2×29945309² = 1793443062210962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29945359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35144 + ... + 35985.

It is an arithmetic number, because the mean of its divisors is an integer number (7504215).

Almost surely, 2^29945309 is an apocalyptic number.

It is an amenable number.

29945309 is a deficient number, since it is larger than the sum of its proper divisors (71551).

29945309 is an equidigital number, since it uses as much as digits as its factorization.

29945309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71550.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 29945309 is about 5472.2307151654. The cubic root of 29945309 is about 310.5343161231.

The spelling of 29945309 in words is "twenty-nine million, nine hundred forty-five thousand, three hundred nine".