61534189 has 2 divisors, whose sum is σ = 61534190. Its totient is φ = 61534188.

The previous prime is 61534147. The next prime is 61534273. The reversal of 61534189 is 98143516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34128964 + 27405225 = 5842^2 + 5235^2 .

It is a cyclic number.

It is not a de Polignac number, because 61534189 - 2²³ = 53145581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61574189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30767094 + 30767095.

It is an arithmetic number, because the mean of its divisors is an integer number (30767095).

Almost surely, 2^61534189 is an apocalyptic number.

It is an amenable number.

61534189 is a deficient number, since it is larger than the sum of its proper divisors (1).

61534189 is an equidigital number, since it uses as much as digits as its factorization.

61534189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 37.

The square root of 61534189 is about 7844.3730788381. The cubic root of 61534189 is about 394.7954696081.

The spelling of 61534189 in words is "sixty-one million, five hundred thirty-four thousand, one hundred eighty-nine".