947994158 has 4 divisors (see below), whose sum is σ = 1421991240. Its totient is φ = 473997078.

The previous prime is 947994149. The next prime is 947994193. The reversal of 947994158 is 851499749.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 851499749 = 53 ⋅16066033.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236998538 + ... + 236998541.

It is an arithmetic number, because the mean of its divisors is an integer number (355497810).

Almost surely, 2^947994158 is an apocalyptic number.

947994158 is a deficient number, since it is larger than the sum of its proper divisors (473997082).

947994158 is a wasteful number, since it uses less digits than its factorization.

947994158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473997081.

The product of its digits is 3265920, while the sum is 56.

The square root of 947994158 is about 30789.5137668655. The cubic root of 947994158 is about 982.3552119558.

The spelling of 947994158 in words is "nine hundred forty-seven million, nine hundred ninety-four thousand, one hundred fifty-eight".