55760989 has 4 divisors (see below), whose sum is σ = 56313180. Its totient is φ = 55208800.

The previous prime is 55760987. The next prime is 55761011. The reversal of 55760989 is 98906755.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53772889 + 1988100 = 7333^2 + 1410^2 .

It is a cyclic number.

It is not a de Polignac number, because 55760989 - 2¹ = 55760987 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 (55760987) 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, 275944 + ... + 276145.

It is an arithmetic number, because the mean of its divisors is an integer number (14078295).

Almost surely, 2^55760989 is an apocalyptic number.

It is an amenable number.

55760989 is a deficient number, since it is larger than the sum of its proper divisors (552191).

55760989 is a wasteful number, since it uses less digits than its factorization.

55760989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552190.

The product of its (nonzero) digits is 680400, while the sum is 49.

The square root of 55760989 is about 7467.3281031437. The cubic root of 55760989 is about 382.0411608288.

The spelling of 55760989 in words is "fifty-five million, seven hundred sixty thousand, nine hundred eighty-nine".