29990705 has 4 divisors (see below), whose sum is σ = 35988852. Its totient is φ = 23992560.

The previous prime is 29990677. The next prime is 29990707. The reversal of 29990705 is 50709992.

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 19998784 + 9991921 = 4472^2 + 3161^2 .

It is not a de Polignac number, because 29990705 - 2⁸ = 29990449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29990707) 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, 2999066 + ... + 2999075.

It is an arithmetic number, because the mean of its divisors is an integer number (8997213).

Almost surely, 2^29990705 is an apocalyptic number.

It is an amenable number.

29990705 is a deficient number, since it is larger than the sum of its proper divisors (5998147).

29990705 is an equidigital number, since it uses as much as digits as its factorization.

29990705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5998146.

The product of its (nonzero) digits is 51030, while the sum is 41.

The square root of 29990705 is about 5476.3769957884. The cubic root of 29990705 is about 310.6911564737.

The spelling of 29990705 in words is "twenty-nine million, nine hundred ninety thousand, seven hundred five".