53509957 has 2 divisors, whose sum is σ = 53509958. Its totient is φ = 53509956.

The previous prime is 53509927. The next prime is 53509969. The reversal of 53509957 is 75990535.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41357761 + 12152196 = 6431^2 + 3486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53509957 is a prime.

It is equal to p_3198697 and since 53509957 and 3198697 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53509927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26754978 + 26754979.

It is an arithmetic number, because the mean of its divisors is an integer number (26754979).

Almost surely, 2^53509957 is an apocalyptic number.

It is an amenable number.

53509957 is a deficient number, since it is larger than the sum of its proper divisors (1).

53509957 is an equidigital number, since it uses as much as digits as its factorization.

53509957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 212625, while the sum is 43.

The square root of 53509957 is about 7315.0500340052. The cubic root of 53509957 is about 376.8294767841.

The spelling of 53509957 in words is "fifty-three million, five hundred nine thousand, nine hundred fifty-seven".