55691453 has 2 divisors, whose sum is σ = 55691454. Its totient is φ = 55691452.

The previous prime is 55691369. The next prime is 55691491. The reversal of 55691453 is 35419655.

It is an a-pointer prime, because the next prime (55691491) can be obtained adding 55691453 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44649124 + 11042329 = 6682^2 + 3323^2 .

It is a cyclic number.

It is not a de Polignac number, because 55691453 - 2²⁰ = 54642877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55621453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27845726 + 27845727.

It is an arithmetic number, because the mean of its divisors is an integer number (27845727).

Almost surely, 2^55691453 is an apocalyptic number.

It is an amenable number.

55691453 is a deficient number, since it is larger than the sum of its proper divisors (1).

55691453 is an equidigital number, since it uses as much as digits as its factorization.

55691453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81000, while the sum is 38.

The square root of 55691453 is about 7462.6706345651. The cubic root of 55691453 is about 381.8822883204.

The spelling of 55691453 in words is "fifty-five million, six hundred ninety-one thousand, four hundred fifty-three".