53661423 has 4 divisors (see below), whose sum is σ = 71548568. Its totient is φ = 35774280.

The previous prime is 53661379. The next prime is 53661427. The reversal of 53661423 is 32416635.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 53661423 - 2¹⁶ = 53595887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53661427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8943568 + ... + 8943573.

It is an arithmetic number, because the mean of its divisors is an integer number (17887142).

Almost surely, 2^53661423 is an apocalyptic number.

53661423 is a deficient number, since it is larger than the sum of its proper divisors (17887145).

53661423 is a wasteful number, since it uses less digits than its factorization.

53661423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17887144.

The product of its digits is 12960, while the sum is 30.

The square root of 53661423 is about 7325.3957572270. The cubic root of 53661423 is about 377.1846946855.

The spelling of 53661423 in words is "fifty-three million, six hundred sixty-one thousand, four hundred twenty-three".