29988989 has 2 divisors, whose sum is σ = 29988990. Its totient is φ = 29988988.

The previous prime is 29988977. The next prime is 29988991. The reversal of 29988989 is 98988992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28536964 + 1452025 = 5342^2 + 1205^2 .

It is a cyclic number.

It is not a de Polignac number, because 29988989 - 2⁸ = 29988733 is a prime.

It is a super-2 number, since 2×29988989² = 1798678922484242, which contains 22 as substring.

Together with 29988991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29984989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14994494 + 14994495.

It is an arithmetic number, because the mean of its divisors is an integer number (14994495).

Almost surely, 2^29988989 is an apocalyptic number.

It is an amenable number.

29988989 is a deficient number, since it is larger than the sum of its proper divisors (1).

29988989 is an equidigital number, since it uses as much as digits as its factorization.

29988989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6718464, while the sum is 62.

The square root of 29988989 is about 5476.2203206226. The cubic root of 29988989 is about 310.6852306800.

The spelling of 29988989 in words is "twenty-nine million, nine hundred eighty-eight thousand, nine hundred eighty-nine".