29780189 has 2 divisors, whose sum is σ = 29780190. Its totient is φ = 29780188.

The previous prime is 29780173. The next prime is 29780197. The reversal of 29780189 is 98108792.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28536964 + 1243225 = 5342^2 + 1115^2 .

It is a cyclic number.

It is not a de Polignac number, because 29780189 - 2⁴ = 29780173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29780159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14890094 + 14890095.

It is an arithmetic number, because the mean of its divisors is an integer number (14890095).

Almost surely, 2^29780189 is an apocalyptic number.

It is an amenable number.

29780189 is a deficient number, since it is larger than the sum of its proper divisors (1).

29780189 is an equidigital number, since it uses as much as digits as its factorization.

29780189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 29780189 is about 5457.1227767020. The cubic root of 29780189 is about 309.9624963302.

The spelling of 29780189 in words is "twenty-nine million, seven hundred eighty thousand, one hundred eighty-nine".