947492261 has 2 divisors, whose sum is σ = 947492262. Its totient is φ = 947492260.

The previous prime is 947492257. The next prime is 947492279. The reversal of 947492261 is 162294749.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 483736036 + 463756225 = 21994^2 + 21535^2 .

It is a cyclic number.

It is not a de Polignac number, because 947492261 - 2² = 947492257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (947492281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473746130 + 473746131.

It is an arithmetic number, because the mean of its divisors is an integer number (473746131).

Almost surely, 2^947492261 is an apocalyptic number.

It is an amenable number.

947492261 is a deficient number, since it is larger than the sum of its proper divisors (1).

947492261 is an equidigital number, since it uses as much as digits as its factorization.

947492261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 947492261 is about 30781.3622343132. The cubic root of 947492261 is about 982.1818184225.

The spelling of 947492261 in words is "nine hundred forty-seven million, four hundred ninety-two thousand, two hundred sixty-one".