61004191 has 2 divisors, whose sum is σ = 61004192. Its totient is φ = 61004190.

The previous prime is 61004189. The next prime is 61004213. The reversal of 61004191 is 19140016.

It is an a-pointer prime, because the next prime (61004213) can be obtained adding 61004191 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61004191 - 2¹ = 61004189 is a prime.

It is a super-2 number, since 2×61004191² = 7443022639128962, which contains 22 as substring.

Together with 61004189, 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 (61004131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30502095 + 30502096.

It is an arithmetic number, because the mean of its divisors is an integer number (30502096).

Almost surely, 2^61004191 is an apocalyptic number.

61004191 is a deficient number, since it is larger than the sum of its proper divisors (1).

61004191 is an equidigital number, since it uses as much as digits as its factorization.

61004191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 61004191 is about 7810.5179725803. The cubic root of 61004191 is about 393.6587333276.

The spelling of 61004191 in words is "sixty-one million, four thousand, one hundred ninety-one".