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997485889 = 315832
BaseRepresentation
bin111011011101000…
…110110101000001
32120111221112101211
4323131012311001
54020324022024
6242551330121
733501330061
oct7335066501
92514845354
10997485889
11472066a04
1223a080941
1312b869a4a
14966953a1
155c886594
hex3b746d41

997485889 has 3 divisors (see below), whose sum is σ = 997517473. Its totient is φ = 997454306.

The previous prime is 997485871. The next prime is 997485899. The reversal of 997485889 is 988584799.

The square root of 997485889 is 31583.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 997485889 - 25 = 997485857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997485809) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15792 + ... + 47374.

Almost surely, 2997485889 is an apocalyptic number.

997485889 is the 31583-rd square number.

997485889 is the 15792-nd centered octagonal number.

It is an amenable number.

997485889 is a deficient number, since it is larger than the sum of its proper divisors (31584).

997485889 is an frugal number, since it uses more digits than its factorization.

997485889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63166 (or 31583 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 67.

The cubic root of 997485889 is about 999.1612597114.

The spelling of 997485889 in words is "nine hundred ninety-seven million, four hundred eighty-five thousand, eight hundred eighty-nine".

Divisors: 1 31583 997485889