53979557 has 2 divisors, whose sum is σ = 53979558. Its totient is φ = 53979556.

The previous prime is 53979553. The next prime is 53979581. The reversal of 53979557 is 75597935.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28718881 + 25260676 = 5359^2 + 5026^2 .

It is a cyclic number.

It is not a de Polignac number, because 53979557 - 2² = 53979553 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53979553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26989778 + 26989779.

It is an arithmetic number, because the mean of its divisors is an integer number (26989779).

Almost surely, 2^53979557 is an apocalyptic number.

It is an amenable number.

53979557 is a deficient number, since it is larger than the sum of its proper divisors (1).

53979557 is an equidigital number, since it uses as much as digits as its factorization.

53979557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1488375, while the sum is 50.

The square root of 53979557 is about 7347.0781267113. The cubic root of 53979557 is about 377.9286116037.

The spelling of 53979557 in words is "fifty-three million, nine hundred seventy-nine thousand, five hundred fifty-seven".