947609649 has 24 divisors (see below), whose sum is σ = 1567255872. Its totient is φ = 540470880.

The previous prime is 947609633. The next prime is 947609657. The reversal of 947609649 is 946906749.

It is not a de Polignac number, because 947609649 - 2⁴ = 947609633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 947609595 and 947609604.

It is not an unprimeable number, because it can be changed into a prime (947609549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20182 + ... + 47984.

It is an arithmetic number, because the mean of its divisors is an integer number (65302328).

Almost surely, 2^947609649 is an apocalyptic number.

It is an amenable number.

947609649 is a deficient number, since it is larger than the sum of its proper divisors (619646223).

947609649 is a wasteful number, since it uses less digits than its factorization.

947609649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28357 (or 28354 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The square root of 947609649 is about 30783.2689784565. The cubic root of 947609649 is about 982.2223786827. Note that the first 3 decimals are identical.

The spelling of 947609649 in words is "nine hundred forty-seven million, six hundred nine thousand, six hundred forty-nine".