61256189 has 2 divisors, whose sum is σ = 61256190. Its totient is φ = 61256188.

The previous prime is 61256161. The next prime is 61256213. The reversal of 61256189 is 98165216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42680089 + 18576100 = 6533^2 + 4310^2 .

It is a cyclic number.

It is not a de Polignac number, because 61256189 - 2²⁰ = 60207613 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61256159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30628094 + 30628095.

It is an arithmetic number, because the mean of its divisors is an integer number (30628095).

Almost surely, 2^61256189 is an apocalyptic number.

It is an amenable number.

61256189 is a deficient number, since it is larger than the sum of its proper divisors (1).

61256189 is an equidigital number, since it uses as much as digits as its factorization.

61256189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 38.

The square root of 61256189 is about 7826.6333119675. The cubic root of 61256189 is about 394.2000345617.

The spelling of 61256189 in words is "sixty-one million, two hundred fifty-six thousand, one hundred eighty-nine".