29990005 has 4 divisors (see below), whose sum is σ = 35988012. Its totient is φ = 23992000.

The previous prime is 29989987. The next prime is 29990011. The reversal of 29990005 is 50009992.

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 23794884 + 6195121 = 4878^2 + 2489^2 .

It is not a de Polignac number, because 29990005 - 2¹¹ = 29987957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2998996 + ... + 2999005.

It is an arithmetic number, because the mean of its divisors is an integer number (8997003).

Almost surely, 2^29990005 is an apocalyptic number.

It is an amenable number.

29990005 is a deficient number, since it is larger than the sum of its proper divisors (5998007).

29990005 is an equidigital number, since it uses as much as digits as its factorization.

29990005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5998006.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 29990005 is about 5476.3130845488. The cubic root of 29990005 is about 310.6887392192.

Adding to 29990005 its reverse (50009992), we get a palindrome (79999997).

The spelling of 29990005 in words is "twenty-nine million, nine hundred ninety thousand, five".