947551573994779 has 4 divisors (see below), whose sum is σ = 1020440156609776. Its totient is φ = 874662991379784.

The previous prime is 947551573994761. The next prime is 947551573994797. The reversal of 947551573994779 is 977499375155749.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (947551573994761) and next prime (947551573994797).

It is a cyclic number.

It is not a de Polignac number, because 947551573994779 - 2⁵ = 947551573994747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 947551573994693 and 947551573994702.

It is not an unprimeable number, because it can be changed into a prime (947551573991779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36444291307479 + ... + 36444291307504.

It is an arithmetic number, because the mean of its divisors is an integer number (255110039152444).

Almost surely, 2^{947551573994779} is an apocalyptic number.

947551573994779 is a deficient number, since it is larger than the sum of its proper divisors (72888582614997).

947551573994779 is a wasteful number, since it uses less digits than its factorization.

947551573994779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72888582614996.

The product of its digits is 94517766000, while the sum is 91.

The spelling of 947551573994779 in words is "nine hundred forty-seven trillion, five hundred fifty-one billion, five hundred seventy-three million, nine hundred ninety-four thousand, seven hundred seventy-nine".