55689013 has 2 divisors, whose sum is σ = 55689014. Its totient is φ = 55689012.

The previous prime is 55688977. The next prime is 55689037. The reversal of 55689013 is 31098655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55681444 + 7569 = 7462^2 + 87^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55689013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55689043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27844506 + 27844507.

It is an arithmetic number, because the mean of its divisors is an integer number (27844507).

Almost surely, 2^55689013 is an apocalyptic number.

It is an amenable number.

55689013 is a deficient number, since it is larger than the sum of its proper divisors (1).

55689013 is an equidigital number, since it uses as much as digits as its factorization.

55689013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 55689013 is about 7462.5071524254. The cubic root of 55689013 is about 381.8767111248.

The spelling of 55689013 in words is "fifty-five million, six hundred eighty-nine thousand, thirteen".