69690945 has 16 divisors (see below), whose sum is σ = 115103232. Its totient is φ = 35969280.

The previous prime is 69690893. The next prime is 69690961. The reversal of 69690945 is 54909696.

It is a happy number.

It is not a de Polignac number, because 69690945 - 2¹¹ = 69688897 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 69690894 and 69690903.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 74472 + ... + 75401.

It is an arithmetic number, because the mean of its divisors is an integer number (7193952).

Almost surely, 2^69690945 is an apocalyptic number.

It is an amenable number.

69690945 is a deficient number, since it is larger than the sum of its proper divisors (45412287).

69690945 is a wasteful number, since it uses less digits than its factorization.

69690945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149912.

The product of its (nonzero) digits is 524880, while the sum is 48.

The square root of 69690945 is about 8348.1102652037. The cubic root of 69690945 is about 411.5211095344.

The spelling of 69690945 in words is "sixty-nine million, six hundred ninety thousand, nine hundred forty-five".