55691767 has 4 divisors (see below), whose sum is σ = 55707120. Its totient is φ = 55676416.

The previous prime is 55691759. The next prime is 55691789. The reversal of 55691767 is 76719655.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 55691767 - 2³ = 55691759 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 (55691707) 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, 1143 + ... + 10615.

It is an arithmetic number, because the mean of its divisors is an integer number (13926780).

Almost surely, 2^55691767 is an apocalyptic number.

55691767 is a deficient number, since it is larger than the sum of its proper divisors (15353).

55691767 is an equidigital number, since it uses as much as digits as its factorization.

55691767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15352.

The product of its digits is 396900, while the sum is 46.

The square root of 55691767 is about 7462.6916725803. The cubic root of 55691767 is about 381.8830060297.

The spelling of 55691767 in words is "fifty-five million, six hundred ninety-one thousand, seven hundred sixty-seven".