29087989 has 4 divisors (see below), whose sum is σ = 33243424. Its totient is φ = 24932556.

The previous prime is 29087923. The next prime is 29087999. The reversal of 29087989 is 98978092.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 29087989 - 2⁹ = 29087477 is a prime.

It is a super-2 number, since 2×29087989² = 1692222208128242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29087999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2077707 + ... + 2077720.

It is an arithmetic number, because the mean of its divisors is an integer number (8310856).

Almost surely, 2^29087989 is an apocalyptic number.

It is an amenable number.

29087989 is a deficient number, since it is larger than the sum of its proper divisors (4155435).

29087989 is an equidigital number, since it uses as much as digits as its factorization.

29087989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4155434.

The product of its (nonzero) digits is 653184, while the sum is 52.

The square root of 29087989 is about 5393.3281932402. The cubic root of 29087989 is about 307.5420930766.

The spelling of 29087989 in words is "twenty-nine million, eighty-seven thousand, nine hundred eighty-nine".