29976985 has 4 divisors (see below), whose sum is σ = 35972388. Its totient is φ = 23981584.

The previous prime is 29976971. The next prime is 29976997. The reversal of 29976985 is 58967992.

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 6677056 + 23299929 = 2584^2 + 4827^2 .

It is a cyclic number.

It is not a de Polignac number, because 29976985 - 2²³ = 21588377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2997694 + ... + 2997703.

It is an arithmetic number, because the mean of its divisors is an integer number (8993097).

Almost surely, 2^29976985 is an apocalyptic number.

It is an amenable number.

29976985 is a deficient number, since it is larger than the sum of its proper divisors (5995403).

29976985 is an equidigital number, since it uses as much as digits as its factorization.

29976985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5995402.

The product of its digits is 2449440, while the sum is 55.

The square root of 29976985 is about 5475.1241995045. The cubic root of 29976985 is about 310.6437714272.

It can be divided in two parts, 299 and 76985, that added together give a square (77284 = 278²).

The spelling of 29976985 in words is "twenty-nine million, nine hundred seventy-six thousand, nine hundred eighty-five".