947260991 has 4 divisors (see below), whose sum is σ = 947669352. Its totient is φ = 946852632.

The previous prime is 947260987. The next prime is 947261011. The reversal of 947260991 is 199062749.

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

It is a cyclic number.

It is not a de Polignac number, because 947260991 - 2² = 947260987 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 (947260091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200681 + ... + 205346.

It is an arithmetic number, because the mean of its divisors is an integer number (236917338).

Almost surely, 2^947260991 is an apocalyptic number.

947260991 is a deficient number, since it is larger than the sum of its proper divisors (408361).

947260991 is a wasteful number, since it uses less digits than its factorization.

947260991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408360.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 947260991 is about 30777.6053486947. The cubic root of 947260991 is about 982.1018995030.

The spelling of 947260991 in words is "nine hundred forty-seven million, two hundred sixty thousand, nine hundred ninety-one".