53491913 has 2 divisors, whose sum is σ = 53491914. Its totient is φ = 53491912.

The previous prime is 53491903. The next prime is 53491931. The reversal of 53491913 is 31919435.

Together with next prime (53491931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53465344 + 26569 = 7312^2 + 163^2 .

It is a cyclic number.

It is not a de Polignac number, because 53491913 - 2⁶ = 53491849 is a prime.

It is a super-3 number, since 3×53491913³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53491903) 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 as a sum of consecutive naturals, namely, 26745956 + 26745957.

It is an arithmetic number, because the mean of its divisors is an integer number (26745957).

Almost surely, 2^53491913 is an apocalyptic number.

It is an amenable number.

53491913 is a deficient number, since it is larger than the sum of its proper divisors (1).

53491913 is an equidigital number, since it uses as much as digits as its factorization.

53491913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 35.

The square root of 53491913 is about 7313.8165823324. The cubic root of 53491913 is about 376.7871153503.

The spelling of 53491913 in words is "fifty-three million, four hundred ninety-one thousand, nine hundred thirteen".