55962009 has 10 divisors (see below), whose sum is σ = 83597690. Its totient is φ = 37307952.

The previous prime is 55961999. The next prime is 55962041. The reversal of 55962009 is 90026955.

It can be written as a sum of positive squares in only one way, i.e., 52881984 + 3080025 = 7272^2 + 1755^2 .

It is not a de Polignac number, because 55962009 - 2⁷ = 55961881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55962509) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 345364 + ... + 345525.

It is an arithmetic number, because the mean of its divisors is an integer number (8359769).

Almost surely, 2^55962009 is an apocalyptic number.

It is an amenable number.

55962009 is a deficient number, since it is larger than the sum of its proper divisors (27635681).

55962009 is an equidigital number, since it uses as much as digits as its factorization.

55962009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690901 (or 690892 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 55962009 is about 7480.7759624253. The cubic root of 55962009 is about 382.4997001151.

The spelling of 55962009 in words is "fifty-five million, nine hundred sixty-two thousand, nine".