61865107 has 2 divisors, whose sum is σ = 61865108. Its totient is φ = 61865106.

The previous prime is 61865093. The next prime is 61865131. The reversal of 61865107 is 70156816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61865107 - 2¹⁵ = 61832339 is a prime.

It is not a weakly prime, because it can be changed into another prime (61865707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30932553 + 30932554.

It is an arithmetic number, because the mean of its divisors is an integer number (30932554).

Almost surely, 2^61865107 is an apocalyptic number.

61865107 is a deficient number, since it is larger than the sum of its proper divisors (1).

61865107 is an equidigital number, since it uses as much as digits as its factorization.

61865107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 61865107 is about 7865.4374957786. The cubic root of 61865107 is about 395.5019139053.

The spelling of 61865107 in words is "sixty-one million, eight hundred sixty-five thousand, one hundred seven".