69663947 has 4 divisors (see below), whose sum is σ = 70340400. Its totient is φ = 68987496.

The previous prime is 69663877. The next prime is 69663953. The reversal of 69663947 is 74936696.

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

It is a cyclic number.

It is not a de Polignac number, because 69663947 - 2¹² = 69659851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 69663895 and 69663904.

It is not an unprimeable number, because it can be changed into a prime (69683947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338072 + ... + 338277.

It is an arithmetic number, because the mean of its divisors is an integer number (17585100).

Almost surely, 2^69663947 is an apocalyptic number.

69663947 is a deficient number, since it is larger than the sum of its proper divisors (676453).

69663947 is a wasteful number, since it uses less digits than its factorization.

69663947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676452.

The product of its digits is 1469664, while the sum is 50.

The square root of 69663947 is about 8346.4930959056. The cubic root of 69663947 is about 411.4679621138.

The spelling of 69663947 in words is "sixty-nine million, six hundred sixty-three thousand, nine hundred forty-seven".