53691413 has 4 divisors (see below), whose sum is σ = 53712780. Its totient is φ = 53670048.

The previous prime is 53691401. The next prime is 53691419. The reversal of 53691413 is 31419635.

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

It can be written as a sum of positive squares in 2 ways, for example, as 43335889 + 10355524 = 6583^2 + 3218^2 .

It is a cyclic number.

It is not a de Polignac number, because 53691413 - 2¹⁸ = 53429269 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53691413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53691419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6320 + ... + 12137.

It is an arithmetic number, because the mean of its divisors is an integer number (13428195).

Almost surely, 2^53691413 is an apocalyptic number.

It is an amenable number.

53691413 is a deficient number, since it is larger than the sum of its proper divisors (21367).

53691413 is a wasteful number, since it uses less digits than its factorization.

53691413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21366.

The product of its digits is 9720, while the sum is 32.

The square root of 53691413 is about 7327.4424596854. The cubic root of 53691413 is about 377.2549478999.

The spelling of 53691413 in words is "fifty-three million, six hundred ninety-one thousand, four hundred thirteen".