69985457 has 2 divisors, whose sum is σ = 69985458. Its totient is φ = 69985456.

The previous prime is 69985429. The next prime is 69985471. The reversal of 69985457 is 75458996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65302561 + 4682896 = 8081^2 + 2164^2 .

It is a cyclic number.

It is not a de Polignac number, because 69985457 - 2¹² = 69981361 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 69985399 and 69985408.

It is not a weakly prime, because it can be changed into another prime (69985057) 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, 34992728 + 34992729.

It is an arithmetic number, because the mean of its divisors is an integer number (34992729).

Almost surely, 2^69985457 is an apocalyptic number.

It is an amenable number.

69985457 is a deficient number, since it is larger than the sum of its proper divisors (1).

69985457 is an equidigital number, since it uses as much as digits as its factorization.

69985457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 53.

The square root of 69985457 is about 8365.7311097118. The cubic root of 69985457 is about 412.0999871221.

The spelling of 69985457 in words is "sixty-nine million, nine hundred eighty-five thousand, four hundred fifty-seven".