61865689 has 4 divisors (see below), whose sum is σ = 62914320. Its totient is φ = 60817060.

The previous prime is 61865659. The next prime is 61865707. The reversal of 61865689 is 98656816.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61865689 - 2¹⁵ = 61832921 is a prime.

It is a super-3 number, since 3×61865689³ (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 (61865659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524227 + ... + 524344.

It is an arithmetic number, because the mean of its divisors is an integer number (15728580).

Almost surely, 2^61865689 is an apocalyptic number.

It is an amenable number.

61865689 is a deficient number, since it is larger than the sum of its proper divisors (1048631).

61865689 is a wasteful number, since it uses less digits than its factorization.

61865689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048630.

The product of its digits is 622080, while the sum is 49.

The square root of 61865689 is about 7865.4744929979. The cubic root of 61865689 is about 395.5031541381.

The spelling of 61865689 in words is "sixty-one million, eight hundred sixty-five thousand, six hundred eighty-nine".