83561677 has 4 divisors (see below), whose sum is σ = 87959680. Its totient is φ = 79163676.

The previous prime is 83561671. The next prime is 83561683. The reversal of 83561677 is 77616538.

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 an interprime number because it is at equal distance from previous prime (83561671) and next prime (83561683).

It is a cyclic number.

It is not a de Polignac number, because 83561677 - 2³ = 83561669 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 (83561671) 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, 2198973 + ... + 2199010.

It is an arithmetic number, because the mean of its divisors is an integer number (21989920).

Almost surely, 2^83561677 is an apocalyptic number.

It is an amenable number.

83561677 is a deficient number, since it is larger than the sum of its proper divisors (4398003).

83561677 is a wasteful number, since it uses less digits than its factorization.

83561677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4398002.

The product of its digits is 211680, while the sum is 43.

The square root of 83561677 is about 9141.2076335679. The cubic root of 83561677 is about 437.1888216611.

The spelling of 83561677 in words is "eighty-three million, five hundred sixty-one thousand, six hundred seventy-seven".