947891101 has 2 divisors, whose sum is σ = 947891102. Its totient is φ = 947891100.

The previous prime is 947891089. The next prime is 947891149. The reversal of 947891101 is 101198749.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 886252900 + 61638201 = 29770^2 + 7851^2 .

It is a cyclic number.

It is not a de Polignac number, because 947891101 - 2¹¹ = 947889053 is a prime.

It is a zygodrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (947891401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473945550 + 473945551.

It is an arithmetic number, because the mean of its divisors is an integer number (473945551).

Almost surely, 2^947891101 is an apocalyptic number.

It is an amenable number.

947891101 is a deficient number, since it is larger than the sum of its proper divisors (1).

947891101 is an equidigital number, since it uses as much as digits as its factorization.

947891101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 947891101 is about 30787.8401483443. The cubic root of 947891101 is about 982.3196131956.

The spelling of 947891101 in words is "nine hundred forty-seven million, eight hundred ninety-one thousand, one hundred one".