53406985 has 8 divisors (see below), whose sum is σ = 64321416. Its totient is φ = 42570240.

The previous prime is 53406961. The next prime is 53407007. The reversal of 53406985 is 58960435.

It can be written as a sum of positive squares in 4 ways, for example, as 121 + 53406864 = 11^2 + 7308^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53406985 - 2⁵ = 53406953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17896 + ... + 20665.

It is an arithmetic number, because the mean of its divisors is an integer number (8040177).

Almost surely, 2^53406985 is an apocalyptic number.

It is an amenable number.

53406985 is a deficient number, since it is larger than the sum of its proper divisors (10914431).

53406985 is a wasteful number, since it uses less digits than its factorization.

53406985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38843.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 53406985 is about 7308.0082785941. The cubic root of 53406985 is about 376.5876040322.

The spelling of 53406985 in words is "fifty-three million, four hundred six thousand, nine hundred eighty-five".