947697087 has 4 divisors (see below), whose sum is σ = 1263596120. Its totient is φ = 631798056.

The previous prime is 947697077. The next prime is 947697109. The reversal of 947697087 is 780796749.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 947697087 - 2²⁶ = 880588223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (947697077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157949512 + ... + 157949517.

It is an arithmetic number, because the mean of its divisors is an integer number (315899030).

Almost surely, 2^947697087 is an apocalyptic number.

947697087 is a deficient number, since it is larger than the sum of its proper divisors (315899033).

947697087 is a wasteful number, since it uses less digits than its factorization.

947697087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315899032.

The product of its (nonzero) digits is 5334336, while the sum is 57.

The square root of 947697087 is about 30784.6891652328. The cubic root of 947697087 is about 982.2525883508.

The spelling of 947697087 in words is "nine hundred forty-seven million, six hundred ninety-seven thousand, eighty-seven".