61963189 has 2 divisors, whose sum is σ = 61963190. Its totient is φ = 61963188.

The previous prime is 61963151. The next prime is 61963241. The reversal of 61963189 is 98136916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39162564 + 22800625 = 6258^2 + 4775^2 .

It is a cyclic number.

It is not a de Polignac number, because 61963189 - 2¹⁷ = 61832117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61363189) 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, 30981594 + 30981595.

It is an arithmetic number, because the mean of its divisors is an integer number (30981595).

Almost surely, 2^61963189 is an apocalyptic number.

It is an amenable number.

61963189 is a deficient number, since it is larger than the sum of its proper divisors (1).

61963189 is an equidigital number, since it uses as much as digits as its factorization.

61963189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 43.

The square root of 61963189 is about 7871.6700261126. The cubic root of 61963189 is about 395.7108153811.

The spelling of 61963189 in words is "sixty-one million, nine hundred sixty-three thousand, one hundred eighty-nine".