69040891 has 2 divisors, whose sum is σ = 69040892. Its totient is φ = 69040890.

The previous prime is 69040847. The next prime is 69040901. The reversal of 69040891 is 19804096.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 69040891 - 2¹¹ = 69038843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 69040891.

It is not a weakly prime, because it can be changed into another prime (69040801) 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, 34520445 + 34520446.

It is an arithmetic number, because the mean of its divisors is an integer number (34520446).

Almost surely, 2^69040891 is an apocalyptic number.

69040891 is a deficient number, since it is larger than the sum of its proper divisors (1).

69040891 is an equidigital number, since it uses as much as digits as its factorization.

69040891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 69040891 is about 8309.0848473222. The cubic root of 69040891 is about 410.2375997395.

The spelling of 69040891 in words is "sixty-nine million, forty thousand, eight hundred ninety-one".