61519189 has 2 divisors, whose sum is σ = 61519190. Its totient is φ = 61519188.

The previous prime is 61519177. The next prime is 61519253. The reversal of 61519189 is 98191516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40220964 + 21298225 = 6342^2 + 4615^2 .

It is a cyclic number.

It is not a de Polignac number, because 61519189 - 2¹⁵ = 61486421 is a prime.

It is a super-2 number, since 2×61519189² = 7569221230435442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61519489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30759594 + 30759595.

It is an arithmetic number, because the mean of its divisors is an integer number (30759595).

Almost surely, 2^61519189 is an apocalyptic number.

It is an amenable number.

61519189 is a deficient number, since it is larger than the sum of its proper divisors (1).

61519189 is an equidigital number, since it uses as much as digits as its factorization.

61519189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 40.

The square root of 61519189 is about 7843.4169212149. The cubic root of 61519189 is about 394.7633876420.

The spelling of 61519189 in words is "sixty-one million, five hundred nineteen thousand, one hundred eighty-nine".