55989623 has 2 divisors, whose sum is σ = 55989624. Its totient is φ = 55989622.

The previous prime is 55989611. The next prime is 55989671. The reversal of 55989623 is 32698955.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55989623 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 (55989673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27994811 + 27994812.

It is an arithmetic number, because the mean of its divisors is an integer number (27994812).

Almost surely, 2^55989623 is an apocalyptic number.

55989623 is a deficient number, since it is larger than the sum of its proper divisors (1).

55989623 is an equidigital number, since it uses as much as digits as its factorization.

55989623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 583200, while the sum is 47.

The square root of 55989623 is about 7482.6213989484. The cubic root of 55989623 is about 382.5626035627.

The spelling of 55989623 in words is "fifty-five million, nine hundred eighty-nine thousand, six hundred twenty-three".