55617629 has 2 divisors, whose sum is σ = 55617630. Its totient is φ = 55617628.

The previous prime is 55617593. The next prime is 55617643. The reversal of 55617629 is 92671655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53436100 + 2181529 = 7310^2 + 1477^2 .

It is a cyclic number.

It is not a de Polignac number, because 55617629 - 2¹² = 55613533 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55617649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27808814 + 27808815.

It is an arithmetic number, because the mean of its divisors is an integer number (27808815).

Almost surely, 2^55617629 is an apocalyptic number.

It is an amenable number.

55617629 is a deficient number, since it is larger than the sum of its proper divisors (1).

55617629 is an equidigital number, since it uses as much as digits as its factorization.

55617629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 41.

The square root of 55617629 is about 7457.7227757540. The cubic root of 55617629 is about 381.7134740006.

The spelling of 55617629 in words is "fifty-five million, six hundred seventeen thousand, six hundred twenty-nine".