29900645 has 4 divisors (see below), whose sum is σ = 35880780. Its totient is φ = 23920512.

The previous prime is 29900641. The next prime is 29900677. The reversal of 29900645 is 54600992.

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 3511876 + 26388769 = 1874^2 + 5137^2 .

It is a cyclic number.

It is not a de Polignac number, because 29900645 - 2² = 29900641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29900641) 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, 2990060 + ... + 2990069.

It is an arithmetic number, because the mean of its divisors is an integer number (8970195).

Almost surely, 2^29900645 is an apocalyptic number.

It is an amenable number.

29900645 is a deficient number, since it is larger than the sum of its proper divisors (5980135).

29900645 is an equidigital number, since it uses as much as digits as its factorization.

29900645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5980134.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 29900645 is about 5468.1482240334. The cubic root of 29900645 is about 310.3798500145.

The spelling of 29900645 in words is "twenty-nine million, nine hundred thousand, six hundred forty-five".