947776947 has 16 divisors (see below), whose sum is σ = 1383223968. Its totient is φ = 573684480.

The previous prime is 947776933. The next prime is 947776957. The reversal of 947776947 is 749677749.

It is not a de Polignac number, because 947776947 - 2¹⁰ = 947775923 is a prime.

It is a super-2 number, since 2×947776947² = 1796562282529281618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (947776957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196818 + ... + 201575.

It is an arithmetic number, because the mean of its divisors is an integer number (86451498).

Almost surely, 2^947776947 is an apocalyptic number.

947776947 is a deficient number, since it is larger than the sum of its proper divisors (435447021).

947776947 is a wasteful number, since it uses less digits than its factorization.

947776947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398470.

The product of its digits is 18670176, while the sum is 60.

The square root of 947776947 is about 30785.9862112618. The cubic root of 947776947 is about 982.2801782103.

The spelling of 947776947 in words is "nine hundred forty-seven million, seven hundred seventy-six thousand, nine hundred forty-seven".