55000691 has 4 divisors (see below), whose sum is σ = 55015584. Its totient is φ = 54985800.

The previous prime is 55000681. The next prime is 55000709. The reversal of 55000691 is 19600055.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 19600055 = 5 ⋅3920011.

It is a cyclic number.

It is not a de Polignac number, because 55000691 - 2¹⁰ = 54999667 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55000691.

It is not an unprimeable number, because it can be changed into a prime (55000681) 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, 2726 + ... + 10836.

It is an arithmetic number, because the mean of its divisors is an integer number (13753896).

Almost surely, 2^55000691 is an apocalyptic number.

55000691 is a deficient number, since it is larger than the sum of its proper divisors (14893).

55000691 is an equidigital number, since it uses as much as digits as its factorization.

55000691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14892.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 55000691 is about 7416.2450741598. The cubic root of 55000691 is about 380.2968386999.

The spelling of 55000691 in words is "fifty-five million, six hundred ninety-one", and thus it is an aban number.