55689071 has 2 divisors, whose sum is σ = 55689072. Its totient is φ = 55689070.

The previous prime is 55689047. The next prime is 55689089. The reversal of 55689071 is 17098655.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55689071 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55689041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27844535 + 27844536.

It is an arithmetic number, because the mean of its divisors is an integer number (27844536).

Almost surely, 2^55689071 is an apocalyptic number.

55689071 is a deficient number, since it is larger than the sum of its proper divisors (1).

55689071 is an equidigital number, since it uses as much as digits as its factorization.

55689071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 55689071 is about 7462.5110385178. The cubic root of 55689071 is about 381.8768436993.

The spelling of 55689071 in words is "fifty-five million, six hundred eighty-nine thousand, seventy-one".