989472791 has 2 divisors, whose sum is σ = 989472792. Its totient is φ = 989472790.

The previous prime is 989472769. The next prime is 989472821. The reversal of 989472791 is 197274989.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 989472791 - 2¹⁰ = 989471767 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989972791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494736395 + 494736396.

It is an arithmetic number, because the mean of its divisors is an integer number (494736396).

Almost surely, 2^989472791 is an apocalyptic number.

989472791 is a deficient number, since it is larger than the sum of its proper divisors (1).

989472791 is an equidigital number, since it uses as much as digits as its factorization.

989472791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 56.

The square root of 989472791 is about 31455.8864284572. The cubic root of 989472791 is about 996.4785442388.

The spelling of 989472791 in words is "nine hundred eighty-nine million, four hundred seventy-two thousand, seven hundred ninety-one".