61868617 has 8 divisors (see below), whose sum is σ = 65858400. Its totient is φ = 57952224.

The previous prime is 61868603. The next prime is 61868621. The reversal of 61868617 is 71686816.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61868617 - 2⁷ = 61868489 is a prime.

It is a super-3 number, since 3×61868617³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61868017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16603 + ... + 19984.

It is an arithmetic number, because the mean of its divisors is an integer number (8232300).

Almost surely, 2^61868617 is an apocalyptic number.

It is an amenable number.

61868617 is a deficient number, since it is larger than the sum of its proper divisors (3989783).

61868617 is a wasteful number, since it uses less digits than its factorization.

61868617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36695.

The product of its digits is 96768, while the sum is 43.

The square root of 61868617 is about 7865.6606206980. The cubic root of 61868617 is about 395.5093935414.

The spelling of 61868617 in words is "sixty-one million, eight hundred sixty-eight thousand, six hundred seventeen".