53979581 has 2 divisors, whose sum is σ = 53979582. Its totient is φ = 53979580.

The previous prime is 53979557. The next prime is 53979593. The reversal of 53979581 is 18597935.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38019556 + 15960025 = 6166^2 + 3995^2 .

It is a cyclic number.

It is not a de Polignac number, because 53979581 - 2⁶ = 53979517 is a prime.

It is a super-2 number, since 2×53979581² = 5827590329871122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53979511) 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 as a sum of consecutive naturals, namely, 26989790 + 26989791.

It is an arithmetic number, because the mean of its divisors is an integer number (26989791).

Almost surely, 2^53979581 is an apocalyptic number.

It is an amenable number.

53979581 is a deficient number, since it is larger than the sum of its proper divisors (1).

53979581 is an equidigital number, since it uses as much as digits as its factorization.

53979581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 47.

The square root of 53979581 is about 7347.0797600135. The cubic root of 53979581 is about 377.9286676143.

The spelling of 53979581 in words is "fifty-three million, nine hundred seventy-nine thousand, five hundred eighty-one".