29191889 has 2 divisors, whose sum is σ = 29191890. Its totient is φ = 29191888.

The previous prime is 29191879. The next prime is 29191901. The reversal of 29191889 is 98819192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26956864 + 2235025 = 5192^2 + 1495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29191889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (29191879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14595944 + 14595945.

It is an arithmetic number, because the mean of its divisors is an integer number (14595945).

Almost surely, 2^29191889 is an apocalyptic number.

It is an amenable number.

29191889 is a deficient number, since it is larger than the sum of its proper divisors (1).

29191889 is an equidigital number, since it uses as much as digits as its factorization.

29191889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 47.

The square root of 29191889 is about 5402.9518783717. The cubic root of 29191889 is about 307.9078299851.

The spelling of 29191889 in words is "twenty-nine million, one hundred ninety-one thousand, eight hundred eighty-nine".