29989109 has 2 divisors, whose sum is σ = 29989110. Its totient is φ = 29989108.

The previous prime is 29989027. The next prime is 29989187. The reversal of 29989109 is 90198992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16630084 + 13359025 = 4078^2 + 3655^2 .

It is a cyclic number.

It is not a de Polignac number, because 29989109 - 2⁸ = 29988853 is a prime.

It is a super-2 number, since 2×29989109² = 1798693317227762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29989009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14994554 + 14994555.

It is an arithmetic number, because the mean of its divisors is an integer number (14994555).

Almost surely, 2^29989109 is an apocalyptic number.

It is an amenable number.

29989109 is a deficient number, since it is larger than the sum of its proper divisors (1).

29989109 is an equidigital number, since it uses as much as digits as its factorization.

29989109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 47.

The square root of 29989109 is about 5476.2312770737. The cubic root of 29989109 is about 310.6856450785.

The spelling of 29989109 in words is "twenty-nine million, nine hundred eighty-nine thousand, one hundred nine".