55761623 has 2 divisors, whose sum is σ = 55761624. Its totient is φ = 55761622.

The previous prime is 55761557. The next prime is 55761631. The reversal of 55761623 is 32616755.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55761623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55761023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27880811 + 27880812.

It is an arithmetic number, because the mean of its divisors is an integer number (27880812).

Almost surely, 2^55761623 is an apocalyptic number.

55761623 is a deficient number, since it is larger than the sum of its proper divisors (1).

55761623 is an equidigital number, since it uses as much as digits as its factorization.

55761623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 35.

The square root of 55761623 is about 7467.3705546196. The cubic root of 55761623 is about 382.0426087538.

The spelling of 55761623 in words is "fifty-five million, seven hundred sixty-one thousand, six hundred twenty-three".