69145457 has 2 divisors, whose sum is σ = 69145458. Its totient is φ = 69145456.

The previous prime is 69145451. The next prime is 69145459. The reversal of 69145457 is 75454196.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36529936 + 32615521 = 6044^2 + 5711^2 .

It is a cyclic number.

It is not a de Polignac number, because 69145457 - 2⁸ = 69145201 is a prime.

Together with 69145459, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (69145451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34572728 + 34572729.

It is an arithmetic number, because the mean of its divisors is an integer number (34572729).

Almost surely, 2^69145457 is an apocalyptic number.

It is an amenable number.

69145457 is a deficient number, since it is larger than the sum of its proper divisors (1).

69145457 is an equidigital number, since it uses as much as digits as its factorization.

69145457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 41.

The square root of 69145457 is about 8315.3747359936. The cubic root of 69145457 is about 410.4446039554. Note that the first 3 decimals are identical.

The spelling of 69145457 in words is "sixty-nine million, one hundred forty-five thousand, four hundred fifty-seven".