53909497 has 2 divisors, whose sum is σ = 53909498. Its totient is φ = 53909496.

The previous prime is 53909419. The next prime is 53909503. The reversal of 53909497 is 79490935.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53523856 + 385641 = 7316^2 + 621^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53909497 is a prime.

It is not a weakly prime, because it can be changed into another prime (53909417) 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, 26954748 + 26954749.

It is an arithmetic number, because the mean of its divisors is an integer number (26954749).

Almost surely, 2^53909497 is an apocalyptic number.

It is an amenable number.

53909497 is a deficient number, since it is larger than the sum of its proper divisors (1).

53909497 is an equidigital number, since it uses as much as digits as its factorization.

53909497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 306180, while the sum is 46.

The square root of 53909497 is about 7342.3086968610. The cubic root of 53909497 is about 377.7650364567.

The spelling of 53909497 in words is "fifty-three million, nine hundred nine thousand, four hundred ninety-seven".