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143233989 = 3194358439
BaseRepresentation
bin10001000100110…
…01001111000101
3100222112001002120
420202121033011
5243131441424
622114000153
73356316543
oct1042311705
9328461076
10143233989
11739408a8
123bb76059
13238a0352
1415046d93
15c894a79
hex88993c5

143233989 has 16 divisors (see below), whose sum is σ = 205708800. Its totient is φ = 88358256.

The previous prime is 143233973. The next prime is 143233991. The reversal of 143233989 is 989332341.

It is not a de Polignac number, because 143233989 - 24 = 143233973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 143233989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143233969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26769 + ... + 31670.

It is an arithmetic number, because the mean of its divisors is an integer number (12856800).

Almost surely, 2143233989 is an apocalyptic number.

143233989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

143233989 is a deficient number, since it is larger than the sum of its proper divisors (62474811).

143233989 is a wasteful number, since it uses less digits than its factorization.

143233989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58504.

The product of its digits is 139968, while the sum is 42.

The square root of 143233989 is about 11968.0403157743. The cubic root of 143233989 is about 523.2172200598.

The spelling of 143233989 in words is "one hundred forty-three million, two hundred thirty-three thousand, nine hundred eighty-nine".

Divisors: 1 3 19 43 57 129 817 2451 58439 175317 1110341 2512877 3331023 7538631 47744663 143233989