947142986 has 16 divisors (see below), whose sum is σ = 1426636800. Its totient is φ = 471602448.

The previous prime is 947142979. The next prime is 947142991. The reversal of 947142986 is 689241749.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 739895 + ... + 741173.

It is an arithmetic number, because the mean of its divisors is an integer number (89164800).

Almost surely, 2^947142986 is an apocalyptic number.

947142986 is a deficient number, since it is larger than the sum of its proper divisors (479493814).

947142986 is a wasteful number, since it uses less digits than its factorization.

947142986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2533.

The product of its digits is 870912, while the sum is 50.

The square root of 947142986 is about 30775.6882295100. The cubic root of 947142986 is about 982.0611160412.

The spelling of 947142986 in words is "nine hundred forty-seven million, one hundred forty-two thousand, nine hundred eighty-six".