69785897 has 4 divisors (see below), whose sum is σ = 69829380. Its totient is φ = 69742416.

The previous prime is 69785893. The next prime is 69785909. The reversal of 69785897 is 79858796.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20939776 + 48846121 = 4576^2 + 6989^2 .

It is a cyclic number.

It is not a de Polignac number, because 69785897 - 2² = 69785893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (69785893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19238 + ... + 22575.

It is an arithmetic number, because the mean of its divisors is an integer number (17457345).

Almost surely, 2^69785897 is an apocalyptic number.

It is an amenable number.

69785897 is a deficient number, since it is larger than the sum of its proper divisors (43483).

69785897 is a wasteful number, since it uses less digits than its factorization.

69785897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43482.

The product of its digits is 7620480, while the sum is 59.

The square root of 69785897 is about 8353.7953649823. The cubic root of 69785897 is about 411.7079201247.

The spelling of 69785897 in words is "sixty-nine million, seven hundred eighty-five thousand, eight hundred ninety-seven".