61870717 has 16 divisors (see below), whose sum is σ = 65525760. Its totient is φ = 58339008.

The previous prime is 61870673. The next prime is 61870727. The reversal of 61870717 is 71707816.

61870717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61870717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61870727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394003 + ... + 394159.

It is an arithmetic number, because the mean of its divisors is an integer number (4095360).

Almost surely, 2^61870717 is an apocalyptic number.

It is an amenable number.

61870717 is a deficient number, since it is larger than the sum of its proper divisors (3655043).

61870717 is a wasteful number, since it uses less digits than its factorization.

61870717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420.

The product of its (nonzero) digits is 16464, while the sum is 37.

The square root of 61870717 is about 7865.7941112134. The cubic root of 61870717 is about 395.5138684022.

The spelling of 61870717 in words is "sixty-one million, eight hundred seventy thousand, seven hundred seventeen".