61706587 has 2 divisors, whose sum is σ = 61706588. Its totient is φ = 61706586.

The previous prime is 61706573. The next prime is 61706609. The reversal of 61706587 is 78560716.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61706587 - 2¹⁵ = 61673819 is a prime.

It is not a weakly prime, because it can be changed into another prime (61706527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30853293 + 30853294.

It is an arithmetic number, because the mean of its divisors is an integer number (30853294).

Almost surely, 2^61706587 is an apocalyptic number.

61706587 is a deficient number, since it is larger than the sum of its proper divisors (1).

61706587 is an equidigital number, since it uses as much as digits as its factorization.

61706587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 61706587 is about 7855.3540340331. The cubic root of 61706587 is about 395.1638203144.

The spelling of 61706587 in words is "sixty-one million, seven hundred six thousand, five hundred eighty-seven".