55557969 has 4 divisors (see below), whose sum is σ = 74077296. Its totient is φ = 37038644.

The previous prime is 55557967. The next prime is 55558001. The reversal of 55557969 is 96975555.

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 55557969 - 2¹ = 55557967 is a prime.

It is a super-2 number, since 2×55557969² = 6173375838809922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55557967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9259659 + ... + 9259664.

It is an arithmetic number, because the mean of its divisors is an integer number (18519324).

Almost surely, 2^55557969 is an apocalyptic number.

It is an amenable number.

55557969 is a deficient number, since it is larger than the sum of its proper divisors (18519327).

55557969 is a wasteful number, since it uses less digits than its factorization.

55557969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18519326.

The product of its digits is 2126250, while the sum is 51.

The square root of 55557969 is about 7453.7218220162. The cubic root of 55557969 is about 381.5769395129.

The spelling of 55557969 in words is "fifty-five million, five hundred fifty-seven thousand, nine hundred sixty-nine".