191942029 has 2 divisors, whose sum is σ = 191942030. Its totient is φ = 191942028.

The previous prime is 191942027. The next prime is 191942041. The reversal of 191942029 is 920249191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163072900 + 28869129 = 12770^2 + 5373^2 .

It is an emirp because it is prime and its reverse (920249191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 191942029 - 2¹ = 191942027 is a prime.

Together with 191942027, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191942021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95971014 + 95971015.

It is an arithmetic number, because the mean of its divisors is an integer number (95971015).

Almost surely, 2^191942029 is an apocalyptic number.

It is an amenable number.

191942029 is a deficient number, since it is larger than the sum of its proper divisors (1).

191942029 is an equidigital number, since it uses as much as digits as its factorization.

191942029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 191942029 is about 13854.3144543496. The cubic root of 191942029 is about 576.8417607160.

The spelling of 191942029 in words is "one hundred ninety-one million, nine hundred forty-two thousand, twenty-nine".