989523174971 has 2 divisors, whose sum is σ = 989523174972. Its totient is φ = 989523174970.

The previous prime is 989523174967. The next prime is 989523174977. The reversal of 989523174971 is 179471325989.

It is a weak prime.

It is an emirp because it is prime and its reverse (179471325989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 989523174971 - 2² = 989523174967 is a prime.

It is a super-2 number, since 2×989523174971² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 989523174898 and 989523174907.

It is not a weakly prime, because it can be changed into another prime (989523174977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494761587485 + 494761587486.

It is an arithmetic number, because the mean of its divisors is an integer number (494761587486).

Almost surely, 2^989523174971 is an apocalyptic number.

989523174971 is a deficient number, since it is larger than the sum of its proper divisors (1).

989523174971 is an equidigital number, since it uses as much as digits as its factorization.

989523174971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34292160, while the sum is 65.

The spelling of 989523174971 in words is "nine hundred eighty-nine billion, five hundred twenty-three million, one hundred seventy-four thousand, nine hundred seventy-one".