53409491 has 2 divisors, whose sum is σ = 53409492. Its totient is φ = 53409490.

The previous prime is 53409487. The next prime is 53409527. The reversal of 53409491 is 19490435.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53409491 - 2² = 53409487 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53409401) 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, 26704745 + 26704746.

It is an arithmetic number, because the mean of its divisors is an integer number (26704746).

Almost surely, 2^53409491 is an apocalyptic number.

53409491 is a deficient number, since it is larger than the sum of its proper divisors (1).

53409491 is an equidigital number, since it uses as much as digits as its factorization.

53409491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 53409491 is about 7308.1797323273. The cubic root of 53409491 is about 376.5934941093.

The spelling of 53409491 in words is "fifty-three million, four hundred nine thousand, four hundred ninety-one".