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999953125 = 5663997
BaseRepresentation
bin111011100110100…
…001001011100101
32120200120212210221
4323212201023211
54021442000000
6243120244341
733531314143
oct7346411345
92520525727
10999953125
114734a1646
1223aa706b1
1312c221a52
1496b38593
155cbc261a
hex3b9a12e5

999953125 has 14 divisors (see below), whose sum is σ = 1249944938. Its totient is φ = 799950000.

The previous prime is 999953113. The next prime is 999953161. The reversal of 999953125 is 521359999.

It can be written as a sum of positive squares in 7 ways, for example, as 984578884 + 15374241 = 31378^2 + 3921^2 .

It is not a de Polignac number, because 999953125 - 25 = 999953093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 16374 + ... + 47623.

Almost surely, 2999953125 is an apocalyptic number.

It is an amenable number.

999953125 is a deficient number, since it is larger than the sum of its proper divisors (249991813).

999953125 is an frugal number, since it uses more digits than its factorization.

999953125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64027 (or 64002 counting only the distinct ones).

The product of its digits is 984150, while the sum is 52.

The square root of 999953125 is about 31622.0354341715. The cubic root of 999953125 is about 999.9843747559.

The spelling of 999953125 in words is "nine hundred ninety-nine million, nine hundred fifty-three thousand, one hundred twenty-five".

Divisors: 1 5 25 125 625 3125 15625 63997 319985 1599925 7999625 39998125 199990625 999953125