29220869 has 2 divisors, whose sum is σ = 29220870. Its totient is φ = 29220868.

The previous prime is 29220853. The next prime is 29220881. The reversal of 29220869 is 96802292.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19918369 + 9302500 = 4463^2 + 3050^2 .

It is a cyclic number.

It is not a de Polignac number, because 29220869 - 2⁴ = 29220853 is a prime.

It is a super-2 number, since 2×29220869² = 1707718370230322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29220809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14610434 + 14610435.

It is an arithmetic number, because the mean of its divisors is an integer number (14610435).

Almost surely, 2^29220869 is an apocalyptic number.

It is an amenable number.

29220869 is a deficient number, since it is larger than the sum of its proper divisors (1).

29220869 is an equidigital number, since it uses as much as digits as its factorization.

29220869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 29220869 is about 5405.6330804079. The cubic root of 29220869 is about 308.0096872480.

The spelling of 29220869 in words is "twenty-nine million, two hundred twenty thousand, eight hundred sixty-nine".