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168494893 = 7163147673
BaseRepresentation
bin10100000101100…
…00011100101101
3102202001102112121
422002300130231
5321113314033
624415232541
74114116520
oct1202603455
9382042477
10168494893
1187124786
1248518751
1328ba6228
1418540bb7
15ebd462d
hexa0b072d

168494893 has 8 divisors (see below), whose sum is σ = 193748288. Its totient is φ = 143537184.

The previous prime is 168494881. The next prime is 168494899. The reversal of 168494893 is 398494861.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 168494893 - 225 = 134940461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168494893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168494899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72696 + ... + 74977.

It is an arithmetic number, because the mean of its divisors is an integer number (24218536).

Almost surely, 2168494893 is an apocalyptic number.

It is an amenable number.

168494893 is a deficient number, since it is larger than the sum of its proper divisors (25253395).

168494893 is a wasteful number, since it uses less digits than its factorization.

168494893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147843.

The product of its digits is 1492992, while the sum is 52.

The square root of 168494893 is about 12980.5582699667. The cubic root of 168494893 is about 552.3261185109.

The spelling of 168494893 in words is "one hundred sixty-eight million, four hundred ninety-four thousand, eight hundred ninety-three".

Divisors: 1 7 163 1141 147673 1033711 24070699 168494893