69775945 has 8 divisors (see below), whose sum is σ = 83792520. Its totient is φ = 55779840.

The previous prime is 69775933. The next prime is 69775949. The reversal of 69775945 is 54957796.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7112889 + 62663056 = 2667^2 + 7916^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 69775945 - 2⁷ = 69775817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 69775892 and 69775901.

It is not an unprimeable number, because it can be changed into a prime (69775949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3801 + ... + 12409.

It is an arithmetic number, because the mean of its divisors is an integer number (10474065).

Almost surely, 2^69775945 is an apocalyptic number.

It is an amenable number.

69775945 is a deficient number, since it is larger than the sum of its proper divisors (14016575).

69775945 is a wasteful number, since it uses less digits than its factorization.

69775945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10235.

The product of its digits is 2381400, while the sum is 52.

The square root of 69775945 is about 8353.1996863477. The cubic root of 69775945 is about 411.6883483001.

The spelling of 69775945 in words is "sixty-nine million, seven hundred seventy-five thousand, nine hundred forty-five".