53685491 has 2 divisors, whose sum is σ = 53685492. Its totient is φ = 53685490.

The previous prime is 53685487. The next prime is 53685529. The reversal of 53685491 is 19458635.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53685491 - 2² = 53685487 is a prime.

It is a super-2 number, since 2×53685491² = 5764263887822162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53685451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26842745 + 26842746.

It is an arithmetic number, because the mean of its divisors is an integer number (26842746).

Almost surely, 2^53685491 is an apocalyptic number.

53685491 is a deficient number, since it is larger than the sum of its proper divisors (1).

53685491 is an equidigital number, since it uses as much as digits as its factorization.

53685491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 41.

The square root of 53685491 is about 7327.0383512030. The cubic root of 53685491 is about 377.2410773645.

The spelling of 53685491 in words is "fifty-three million, six hundred eighty-five thousand, four hundred ninety-one".