947531378 has 8 divisors (see below), whose sum is σ = 1422607872. Its totient is φ = 473328756.

The previous prime is 947531357. The next prime is 947531381. The reversal of 947531378 is 873135749.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215750 + ... + 220097.

It is an arithmetic number, because the mean of its divisors is an integer number (177825984).

Almost surely, 2^947531378 is an apocalyptic number.

947531378 is a deficient number, since it is larger than the sum of its proper divisors (475076494).

947531378 is a wasteful number, since it uses less digits than its factorization.

947531378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436936.

The product of its digits is 635040, while the sum is 47.

The square root of 947531378 is about 30781.9976284841. The cubic root of 947531378 is about 982.1953346199.

The spelling of 947531378 in words is "nine hundred forty-seven million, five hundred thirty-one thousand, three hundred seventy-eight".