53178409 has 2 divisors, whose sum is σ = 53178410. Its totient is φ = 53178408.

The previous prime is 53178379. The next prime is 53178413. The reversal of 53178409 is 90487135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50126400 + 3052009 = 7080^2 + 1747^2 .

It is a cyclic number.

It is not a de Polignac number, because 53178409 - 2⁹ = 53177897 is a prime.

It is not a weakly prime, because it can be changed into another prime (53178439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26589204 + 26589205.

It is an arithmetic number, because the mean of its divisors is an integer number (26589205).

Almost surely, 2^53178409 is an apocalyptic number.

It is an amenable number.

53178409 is a deficient number, since it is larger than the sum of its proper divisors (1).

53178409 is an equidigital number, since it uses as much as digits as its factorization.

53178409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 53178409 is about 7292.3527753394. The cubic root of 53178409 is about 376.0495846219.

The spelling of 53178409 in words is "fifty-three million, one hundred seventy-eight thousand, four hundred nine".