53043691 has 2 divisors, whose sum is σ = 53043692. Its totient is φ = 53043690.

The previous prime is 53043673. The next prime is 53043707. The reversal of 53043691 is 19634035.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53043691 - 2⁷ = 53043563 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53043631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26521845 + 26521846.

It is an arithmetic number, because the mean of its divisors is an integer number (26521846).

Almost surely, 2^53043691 is an apocalyptic number.

53043691 is a deficient number, since it is larger than the sum of its proper divisors (1).

53043691 is an equidigital number, since it uses as much as digits as its factorization.

53043691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 53043691 is about 7283.1099813198. The cubic root of 53043691 is about 375.7317646075.

The spelling of 53043691 in words is "fifty-three million, forty-three thousand, six hundred ninety-one".