947440065 has 32 divisors (see below), whose sum is σ = 1780926336. Its totient is φ = 424028160.

The previous prime is 947440051. The next prime is 947440129. The reversal of 947440065 is 560044749.

It is a happy number.

It is not a de Polignac number, because 947440065 - 2⁴ = 947440049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 218704 + ... + 222993.

It is an arithmetic number, because the mean of its divisors is an integer number (55653948).

Almost surely, 2^947440065 is an apocalyptic number.

It is an amenable number.

947440065 is a deficient number, since it is larger than the sum of its proper divisors (833486271).

947440065 is a wasteful number, since it uses less digits than its factorization.

947440065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441729.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 947440065 is about 30780.5143719204. The cubic root of 947440065 is about 982.1637824252.

The spelling of 947440065 in words is "nine hundred forty-seven million, four hundred forty thousand, sixty-five".