61889207 has 2 divisors, whose sum is σ = 61889208. Its totient is φ = 61889206.

The previous prime is 61889189. The next prime is 61889239. The reversal of 61889207 is 70298816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61889207 - 2⁶ = 61889143 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61889257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30944603 + 30944604.

It is an arithmetic number, because the mean of its divisors is an integer number (30944604).

Almost surely, 2^61889207 is an apocalyptic number.

61889207 is a deficient number, since it is larger than the sum of its proper divisors (1).

61889207 is an equidigital number, since it uses as much as digits as its factorization.

61889207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 61889207 is about 7866.9693656452. The cubic root of 61889207 is about 395.5532641152.

The spelling of 61889207 in words is "sixty-one million, eight hundred eighty-nine thousand, two hundred seven".