947492789 has 2 divisors, whose sum is σ = 947492790. Its totient is φ = 947492788.

The previous prime is 947492753. The next prime is 947492813. The reversal of 947492789 is 987294749.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 933302500 + 14190289 = 30550^2 + 3767^2 .

It is a cyclic number.

It is not a de Polignac number, because 947492789 - 2¹⁶ = 947427253 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (947492719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 473746394 + 473746395.

It is an arithmetic number, because the mean of its divisors is an integer number (473746395).

Almost surely, 2^947492789 is an apocalyptic number.

It is an amenable number.

947492789 is a deficient number, since it is larger than the sum of its proper divisors (1).

947492789 is an equidigital number, since it uses as much as digits as its factorization.

947492789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 59.

The square root of 947492789 is about 30781.3708109304. The cubic root of 947492789 is about 982.1820008661.

The spelling of 947492789 in words is "nine hundred forty-seven million, four hundred ninety-two thousand, seven hundred eighty-nine".