55087469 has 2 divisors, whose sum is σ = 55087470. Its totient is φ = 55087468.

The previous prime is 55087447. The next prime is 55087471. The reversal of 55087469 is 96478055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31922500 + 23164969 = 5650^2 + 4813^2 .

It is a cyclic number.

It is not a de Polignac number, because 55087469 - 2¹⁶ = 55021933 is a prime.

It is a super-2 number, since 2×55087469² = 6069258481651922, which contains 22 as substring.

Together with 55087471, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55687469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27543734 + 27543735.

It is an arithmetic number, because the mean of its divisors is an integer number (27543735).

Almost surely, 2^55087469 is an apocalyptic number.

It is an amenable number.

55087469 is a deficient number, since it is larger than the sum of its proper divisors (1).

55087469 is an equidigital number, since it uses as much as digits as its factorization.

55087469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 55087469 is about 7422.0933031053. The cubic root of 55087469 is about 380.4967395711.

The spelling of 55087469 in words is "fifty-five million, eighty-seven thousand, four hundred sixty-nine".