55986761 has 4 divisors (see below), whose sum is σ = 58420992. Its totient is φ = 53552532.

The previous prime is 55986757. The next prime is 55986769. The reversal of 55986761 is 16768955.

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 55986761 - 2² = 55986757 is a prime.

It is a super-2 number, since 2×55986761² = 6269034814542242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55986769) 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, 1217081 + ... + 1217126.

It is an arithmetic number, because the mean of its divisors is an integer number (14605248).

Almost surely, 2^55986761 is an apocalyptic number.

It is an amenable number.

55986761 is a deficient number, since it is larger than the sum of its proper divisors (2434231).

55986761 is a wasteful number, since it uses less digits than its factorization.

55986761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2434230.

The product of its digits is 453600, while the sum is 47.

The square root of 55986761 is about 7482.4301533660. The cubic root of 55986761 is about 382.5560850165.

The spelling of 55986761 in words is "fifty-five million, nine hundred eighty-six thousand, seven hundred sixty-one".