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997490971 = 611932439
BaseRepresentation
bin111011011101001…
…000000100011011
32120111221210101001
4323131020010123
54020324202341
6242551405431
733501350641
oct7335100433
92514853331
10997490971
1147206a804
1223a083877
1312b86c159
1496697191
155c887d31
hex3b74811b

997490971 has 12 divisors (see below), whose sum is σ = 1021445040. Its totient is φ = 973831680.

The previous prime is 997490959. The next prime is 997490981. The reversal of 997490971 is 179094799.

997490971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 997490971 - 25 = 997490939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997490951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2271970 + ... + 2272408.

It is an arithmetic number, because the mean of its divisors is an integer number (85120420).

Almost surely, 2997490971 is an apocalyptic number.

997490971 is the 18235-th hex number.

997490971 is a deficient number, since it is larger than the sum of its proper divisors (23954069).

997490971 is an equidigital number, since it uses as much as digits as its factorization.

997490971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 1285956, while the sum is 55.

The square root of 997490971 is about 31583.0804545725. The cubic root of 997490971 is about 999.1629565538.

The spelling of 997490971 in words is "nine hundred ninety-seven million, four hundred ninety thousand, nine hundred seventy-one".

Divisors: 1 61 193 439 11773 26779 37249 84727 2272189 5168347 16352311 997490971